{
    "EventType": "ComposeMediaComplete",
    "ComposeMediaCompleteEvent": {
        "TaskId": "ComposeMedia-f5ac8127b3b6b85cdc13f237c6005d8",
        "Status": "FINISH",
        "ErrCode": 0,
        "Message": "SUCCESS",
        "Input":{
            "Tracks": [{
                    "Type": "Video",
                    "TrackItems": [{
                        "Type": "Video",
                        "SourceMedia": "5285485487985271487",
                        "AudioOperations": [{
                            "Type": "Volume",
                            "VolumeParam": {
                                "Mute": 1
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                        }]
                    }]
                },
                {
                    "Type": "Audio",
                    "TrackItems": [{
                            "Type": "Empty",
                            "EmptyItem": {
                                "Duration": 5
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                        },
                        {
                            "Type": "Audio",
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                        {
                            "Type": "Audio",
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                                "SourceMediaStartTime": 2,
                                "Duration": 14
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                        }
                    ]
                }
            ],
            "Output":{
                "FileName": "ビデオ合成効果テスト",
                "Container": "mp4"
            }
        },
        "Output":{
            "FileType": "mp4",
            "FileId": 5285485487985271490,
            "FileUrl": "http://125676836723.vod2.myqcloud.com/xxx/xxx/xxx.mp4"
        }
    }
}