{
  "id": "<string>",
  "sequence_id": 123,
  "task_id": "<string>",
  "agent_id": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "content": {
    "type": "text",
    "author": "user",
    "style": "static",
    "format": "plain",
    "content": "<string>",
    "attachments": [
      {
        "file_id": "<string>",
        "name": "<string>",
        "size": 123,
        "type": "<string>"
      }
    ]
  }
}