curl --request POST \
  --url https://api.ontora.com/v1/projects/{project_id}/graph/update \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "message_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "nodes": [],
  "edges": [],
  "ukl_refs": []
}
'

{
  "nodes_created": 123,
  "edges_created": 123,
  "refs_created": 123,
  "node_keys": [
    "<string>"
  ]
}