curl --request POST \
  --url https://api.vzaps.com/instances/{id}/contact/add \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "phone": "<string>",
  "first_name": "<string>",
  "full_name": "<string>"
}
'

{
  "code": 200,
  "success": true,
  "data": "Contact added"
}