curl --request POST \
  --url http://localhost:3000/api/sms-programs/{id}/cancel

{
  "senderId": "<string>",
  "resolvedSenderId": {
    "id": "123e4567-e89b-12d3-a456-426614174000",
    "senderId": "GoMobile",
    "country": "MA"
  }
}