curl --request POST \
  --url https://api.vzaps.com/instances/{id}/subscribe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{}'

{
  "url": "",
  "session_id": "sub_xxxxxxxx",
  "mode": "direct",
  "subscription_id": "sub_xxxxxxxx"
}