FlashFileEvent(闪传文件)

{
    "time": 1640995200,
    "self_id": 123456789,
    "post_type": "notice",
    "notice_type": "flash_file",
    "sub_type": "downloaded",
    "title": "string",
    "share_link": "string",
    "file_set_id": "string",
    "files": [
        {
            "name": "string",
            "size": 0,
            "path": "string"
        }
    ],
    "downloaded_size": 0,
    "uploaded_size": 0,
    "total_size": 0,
    "speed": 0,
    "remain_seconds": 0
}