Voting API REST POST (create with REST) doesn't work, validation error, when referenced entity other than node

Hi Everyone,

I'm trying to post a vote through a REST POST call using json (or hal_json).
The GET request works just fine and I'm able to get the output which is something similar to this:

url: http://localhost:8001/entity/vote/19?_format=json

{
"id":[
{
"value": 19
}
],
"uuid":[
{
"value": "c81b488a-d5a1-49f4-97ea-4681c3248414"
}
],
"type":[
{
"target_id": "like",
"target_type": "vote_type",
"target_uuid": "cacd122f-8bfe-484c-9585-ee64ddb47c3d"
}
],
"entity_type":[
{
"value": "post"
}
],
"entity_id":[
{
"target_id": 52
}
],
"value":[
{
"value": 1
}
],
"value_type":[
{
"value": "points"
}
],
"user_id":[
{
"target_id": 13,
"target_type": "user",
"target_uuid": "94227fde-1ef5-43ef-a229-943d0fd54fa4",
"url": "/en/user/13/stream"
}
],
"timestamp":[
{
"value": "2018-07-16T08:03:28+00:00",
"format": "Y-m-d\\TH:i:sP"
}
],
"vote_source":[
{
"value": "::1"
}
]
}

The problem is that when i try to post a vote on a post/comment by using the following code, it returns an error which is:

422 Unprocessable Entity
and it says this:

"Unprocessable Entity: validation failed.\nentity_id.0.target_id: The referenced entity (node: 70) does not exist.

code used in the post:
url: http://localhost:8001/entity/vote?_format=json
authenticated with X-CSRF-Token

{
"type":[
{
"target_id": "like",
"target_type": "vote_type"
}
],
"entity_type":[
{
"value": "post"
}
],
"entity_id":[
{
"target_id": 70
}
],
"value":[
{
"value": 1
}
],
"value_type":[
{
"value": "points"
}
],
"user_id":[
{
"target_id": 13,
"target_type": "user",
"url": "/en/user/13/stream"
}
],
"timestamp":[
{
"value": "2018-07-16T08:03:28+00:00",
"format": "Y-m-d\\TH:i:sP"
}
],
"vote_source":[
{
"value": "::1"
}
]
}

So basically it is saying that the entity 70th is a node (when in reality it's a simple post) and it doesn't work.
If i try to post a vote on an actual node instead, it works like a charm.

Some suggestions?