diff --git a/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php b/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php
index a6530d1..2b2e99e 100644
--- a/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php
+++ b/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php
@@ -93,6 +93,12 @@ class JsonApiDocumentTopLevelNormalizer extends NormalizerBase implements Denorm
       $normalized = $data['data']['attributes'];
     }
 
+    if (!empty($data['data']['id'])) {
+      $resource_type = $this->resourceTypeRepository->getByTypeName($data['data']['type']);
+      $uuid_key = $this->entityTypeManager->getDefinition($resource_type->getEntityTypeId())->getKey('uuid');
+      $normalized[$uuid_key] = $data['data']['id'];
+    }
+
     if (!empty($data['data']['relationships'])) {
       // Turn all single object relationship data fields into an array of objects.
       $relationships = array_map(function ($relationship) {