{
  "data": {
    "requestId": "30486456-ed41-46ba-96eb-06c4ff3b95d9",
    "eventCategoryType": "TransactionalSendEvents.EmailNotSent",
    "timestamp": "2025-07-24T06:26:58.463",
    "compositeId": "56941A9F-3A8F-E811-80E0-1402EC6B9529.4647028.622338.1.318768528",
    "info": {
      "messageKey": "9a-zUvWf3UKxLpwwIrqTmQ",
      "contactKey": "ec25a8c8-6d4e-42f0-84c3-4ea23564cbe5",
      "to": "recipient@example.com"
    },
    "statusCode": 16,
    "statusMessage": "InvalidAttributeValue"
  }
}