curl --request POST \
  --url https://developer.synq.io/api/entities/custom/v1/relationships \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "relationships": [
    {
      "upstream": {
        "airflowDag": {
          "integrationId": "<string>",
          "dagId": "<string>"
        }
      },
      "downstream": {
        "airflowDag": {
          "integrationId": "<string>",
          "dagId": "<string>"
        }
      }
    }
  ]
}
'

{}