curl --request POST \
  --url https://api.ctrl-hub.com/v3/documents/{document_id}/contents \
  --header 'Content-Type: application/vnd.api+json' \
  --header 'X-Session-Token: <api-key>' \
  --data '
{
  "data": {
    "type": "<string>",
    "attributes": {
      "upload_id": "<string>"
    }
  }
}
'

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "type": "<string>",
    "attributes": {},
    "meta": {
      "created_at": "2023-11-07T05:31:56Z",
      "extension": "<string>",
      "downloads": 123,
      "checksum": "<string>",
      "content_type": "<string>",
      "is_latest": true,
      "size": 123,
      "version": 123
    },
    "relationships": {
      "organisation": {
        "data": {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "type": "<string>"
        }
      },
      "author": {
        "data": {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "type": "<string>"
        }
      },
      "document": {
        "data": [
          {
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "type": "<string>"
          }
        ]
      }
    }
  },
  "jsonapi": {
    "version": "<string>"
  },
  "included": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "type": "<string>",
      "attributes": {
        "name": "<string>",
        "expires_at": "2023-11-07T05:31:56Z"
      },
      "meta": {
        "created_at": "2023-11-07T05:31:56Z",
        "downloads": 123,
        "latest": {
          "content_type": "<string>",
          "checksum": "<string>",
          "size": 123
        },
        "updated_at": "2023-11-07T05:31:56Z"
      },
      "relationships": {
        "organisation": {
          "data": {
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "type": "<string>"
          }
        },
        "all_content": {
          "data": [
            {
              "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
              "type": "<string>"
            }
          ]
        },
        "author": {
          "data": {
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "type": "<string>"
          }
        },
        "folder": {
          "data": {
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "type": "<string>"
          }
        },
        "latest_content": {
          "data": {
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "type": "<string>"
          }
        }
      }
    }
  ]
}