WebhookMessageData

{
    "chat_user_id": 12345,
    "sequence_id": "78543891234567890",
    "msg_type": "text",
    "msg": "https://cdn.example.com/webhook/video.mp4",
    "send_time": 1787568000,
    "quote_chat": [],
    "chat_session_id": 98765,
    "channel_uid": "1122334455",
    "sys_user_id": 10001,
    "channel": 1,
    "sender_type": 1,
    "sender": 10001,
    "channel_id": 1122,
    "channel_name": "Messenger Page",
    "mid": "m_001",
    "chat_session_encrypt_id": "ENC_SESSION_ID",
    "chat_user": {
        "property1": "string",
        "property2": "string"
    }
}