diff --git a/core/modules/layout_builder/layout_builder.services.yml b/core/modules/layout_builder/layout_builder.services.yml
index 6e94ed74d2..331eaeefe1 100644
--- a/core/modules/layout_builder/layout_builder.services.yml
+++ b/core/modules/layout_builder/layout_builder.services.yml
@@ -51,3 +51,14 @@ services:
   inline_block.usage:
     class: Drupal\layout_builder\InlineBlockUsage
     arguments: ['@database']
+  layout_builder.normalizer.section_data:
+    class: Drupal\layout_builder\Normalizer\SectionDataNormalizer
+    tags:
+        # Priority must be higher than serializer.normalizer.typed_data.
+      - { name: normalizer, priority: 1 }
+  layout_builder.normalizer.layout_section_item:
+    class: Drupal\layout_builder\Normalizer\LayoutSectionItemNormalizer
+    public: false
+    tags:
+        # Priority must be higher than serializer.normalizer.entity_reference_field_item.
+      - { name: normalizer, priority: 9 }
diff --git a/core/modules/layout_builder/src/Field/LayoutSectionItemList.php b/core/modules/layout_builder/src/Field/LayoutSectionItemList.php
index 3243be97a6..3721cedf71 100644
--- a/core/modules/layout_builder/src/Field/LayoutSectionItemList.php
+++ b/core/modules/layout_builder/src/Field/LayoutSectionItemList.php
@@ -102,6 +102,11 @@ public function equals(FieldItemListInterface $list_to_compare) {
    */
   public function defaultAccess($operation = 'view', AccountInterface $account = NULL) {
     // @todo Allow access in https://www.drupal.org/node/2942975.
+
+    if ($operation === 'view') {
+      return parent::defaultAccess($operation, $account);
+    }
+
     return AccessResult::forbidden();
   }
 
diff --git a/core/modules/layout_builder/src/LayoutBuilderServiceProvider.php b/core/modules/layout_builder/src/LayoutBuilderServiceProvider.php
index 71005ee48c..837d5b4516 100644
--- a/core/modules/layout_builder/src/LayoutBuilderServiceProvider.php
+++ b/core/modules/layout_builder/src/LayoutBuilderServiceProvider.php
@@ -39,14 +39,6 @@ public function register(ContainerBuilder $container) {
       $definition->addTag('event_subscriber');
       $container->setDefinition('layout_builder.get_block_dependency_subscriber', $definition);
     }
-    if (isset($modules['serialization'])) {
-      $definition = (new ChildDefinition('serializer.normalizer.config_entity'))
-        ->setClass(LayoutEntityDisplayNormalizer::class)
-        // Ensure that this normalizer takes precedence for Layout Builder data
-        // over the generic serializer.normalizer.config_entity.
-        ->addTag('normalizer', ['priority' => 5]);
-      $container->setDefinition('layout_builder.normalizer.layout_entity_display', $definition);
-    }
   }
 
 }
diff --git a/core/modules/layout_builder/src/Normalizer/LayoutSectionItemNormalizer.php b/core/modules/layout_builder/src/Normalizer/LayoutSectionItemNormalizer.php
new file mode 100644
index 0000000000..bf91eb56e3
--- /dev/null
+++ b/core/modules/layout_builder/src/Normalizer/LayoutSectionItemNormalizer.php
@@ -0,0 +1,33 @@
+<?php
+
+
+namespace Drupal\layout_builder\Normalizer;
+
+use Drupal\layout_builder\Plugin\DataType\SectionData;
+use Drupal\layout_builder\Plugin\Field\FieldType\LayoutSectionItem;
+use Drupal\serialization\Normalizer\FieldItemNormalizer;
+
+/**
+ * Normalizes section lists.
+ *
+ * @todo Remove in https://www.drupal.org/node/issues/2957385
+ *
+ * @internal
+ */
+class LayoutSectionItemNormalizer extends FieldItemNormalizer {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $supportedInterfaceOrClass = LayoutSectionItem::class;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
+    /** @var \Drupal\layout_builder\Plugin\DataType\SectionData $section_data */
+    $section_data = $this->serializer->denormalize($data['section'], SectionData::class, $format, $context);;
+    return parent::denormalize($section_data->getValue(), $class, $format, $context);
+  }
+
+}
diff --git a/core/modules/layout_builder/src/Normalizer/SectionDataNormalizer.php b/core/modules/layout_builder/src/Normalizer/SectionDataNormalizer.php
new file mode 100644
index 0000000000..d90c9088f5
--- /dev/null
+++ b/core/modules/layout_builder/src/Normalizer/SectionDataNormalizer.php
@@ -0,0 +1,46 @@
+<?php
+
+
+namespace Drupal\layout_builder\Normalizer;
+
+use Drupal\layout_builder\Plugin\DataType\SectionData;
+use Drupal\layout_builder\Section;
+use Drupal\serialization\Normalizer\TypedDataNormalizer;
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
+
+/**
+ * Normalizes section data.
+ */
+class SectionDataNormalizer extends TypedDataNormalizer implements DenormalizerInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected $supportedInterfaceOrClass = SectionData::class;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function normalize($object, $format = NULL, array $context = []) {
+    return $object->getValue()->toArray();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function denormalize($data, $class, $format = NULL, array $context = []) {
+    if (!isset($context['target_instance'])) {
+      throw new InvalidArgumentException('$context[\'target_instance\'] must be set to denormalize with the SectionDataNormalizer');
+    }
+
+    /** @var \Drupal\Core\Field\FieldItemInterface $field_item */
+    $target_instance = $context['target_instance'];
+
+    $object = SectionData::createInstance($target_instance->getDataDefinition());
+    $section = Section::fromArray($data);
+    $object->setValue($section);
+    return $object;
+  }
+
+}
diff --git a/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php b/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
index 01f64eb37f..c4f37de8d6 100644
--- a/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
+++ b/core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
@@ -294,6 +294,8 @@ public function saveBlockContent($new_revision = FALSE, $duplicate_block = FALSE
       $block->save();
       $this->configuration['block_revision_id'] = $block->getRevisionId();
       $this->configuration['block_serialized'] = NULL;
+      $this->configuration['type'] = $block->bundle();
+      $this->configuration['uuid'] = $block->uuid();
     }
   }
 
diff --git a/core/modules/layout_builder/src/Plugin/DataType/SectionData.php b/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
index 8783904d49..a3f99bf967 100644
--- a/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
+++ b/core/modules/layout_builder/src/Plugin/DataType/SectionData.php
@@ -29,11 +29,23 @@ class SectionData extends TypedData {
   /**
    * {@inheritdoc}
    */
-  public function setValue($value, $notify = TRUE) {
+  public function setValue($value, $notify = TRUE)
+  {
+    if ($value && is_array($value)) {
+      $value = Section::fromArray($value);
+    }
+
     if ($value && !$value instanceof Section) {
-      throw new \InvalidArgumentException(sprintf('Value assigned to "%s" is not a valid section', $this->getName()));
+      if (isset($value->value) && !$value->value instanceof Section) {
+        throw new \InvalidArgumentException(sprintf('Value assigned to "%s" is not a valid section', $this->getName()));
+      }
+      else {
+        parent::setValue($value->value, $notify);
+      }
+    }
+    else {
+      parent::setValue($value, $notify);
     }
-    parent::setValue($value, $notify);
   }
 
 }
diff --git a/core/modules/layout_builder/tests/src/Unit/SectionDataNormalizerTest.php b/core/modules/layout_builder/tests/src/Unit/SectionDataNormalizerTest.php
new file mode 100644
index 0000000000..58a3644b56
--- /dev/null
+++ b/core/modules/layout_builder/tests/src/Unit/SectionDataNormalizerTest.php
@@ -0,0 +1,87 @@
+<?php
+
+
+namespace Drupal\Tests\layout_builder\Unit;
+
+use Drupal\Core\Field\FieldItemInterface;
+use Drupal\Core\TypedData\DataDefinitionInterface;
+use Drupal\layout_builder\Normalizer\SectionDataNormalizer;
+use Drupal\layout_builder\Plugin\DataType\SectionData;
+use Drupal\layout_builder\Section;
+use Drupal\Tests\UnitTestCase;
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+
+/**
+ * @coversDefaultClass \Drupal\layout_builder\Normalizer\SectionDataNormalizer
+ * @group layout_builder
+ */
+class SectionDataNormalizerTest extends UnitTestCase {
+
+  /**
+   * The normalizer.
+   *
+   * @var \Drupal\layout_builder\Normalizer\SectionDataNormalizer
+   */
+  protected $normalizer;
+
+  /**
+   * @covers ::supportsNormalization
+   */
+  public function testSupportsNormalization() {
+    $section_data = $this->prophesize(SectionData::class);
+    $this->assertTrue($this->normalizer->supportsNormalization($section_data->reveal()));
+  }
+
+  /**
+   * @covers ::supportsDenormalization
+   */
+  public function testSupportsDenormalization() {
+    $this->assertTrue($this->normalizer->supportsDenormalization([], SectionData::class));
+  }
+
+  /**
+   * Tests the normalize function.
+   *
+   * @covers ::normalize
+   */
+  public function testNormalize() {
+    $data = ['foo'];
+    $section_data = $this->prophesize(SectionData::class);
+    $section = $this->prophesize(Section::class);
+    $section->toArray()
+      ->willReturn($data);
+    $section_data->getValue()
+      ->willReturn($section);
+    $this->assertArrayEquals($data, $this->normalizer->normalize($section_data->reveal()));
+  }
+
+  /**
+   * Tests the denormalize function.
+   *
+   * @covers ::denormalize
+   */
+  public function testDenormalize() {
+    $data = ['foo'];
+    $target_instance = $this->prophesize(FieldItemInterface::class);
+    $target_instance->getDataDefinition()
+      ->willReturn($this->prophesize(DataDefinitionInterface::class));
+    $context = [
+      'target_instance' => [
+        $target_instance,
+      ],
+    ];
+    $this->setExpectedException(InvalidArgumentException::class);
+    $this->normalizer->denormalize($data, SectionData::class);
+    $section_data = $this->normalizer->denormalize($data, SectionData::class, $context);
+    $this->assertArrayEquals($data, $section_data->getValue()->toArray());
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->normalizer = new SectionDataNormalizer();
+  }
+
+}