OJ CUSTOMER update return

{
  "id": "6b4f4c458e0d2a8d8084de54117a95343d958c91",
  "contactinfo": "Changed information about a customer",
  "firstname": "CUSTOMER",
  "phone": "0123456789",
  "lastname": "LAMBDA",
  "email": "customer.lambda@openjet.com",
  "reservations": []
}