{
  "sender_id": "MYCOMPANY",
  "purpose": "Marketing and promotional campaigns"
}

{
  "success": true,
  "data": {
    "id": 3,
    "uuid": "93489425-387g-6aeb-c385-7cgh3c4e8h23",
    "sender_id": "MYCOMPANY",
    "purpose": "Marketing and promotional campaigns",
    "status": "pending",
    "created_at": "2026-01-15T13:00:00.000000Z",
    "updated_at": "2026-01-15T13:00:00.000000Z"
  }
}

{
  "success": false,
  "message": "The given data was invalid.",
  "errors": {
    "sender_id": ["The sender id must not exceed 11 characters."]
  }
}