messagepb.DownloadAppAttachResponse

{
    "app_id": "string",
    "base_response": {
        "code": 0,
        "message": {
            "value": "string"
        }
    },
    "chunk": {
        "data": [
            0
        ],
        "size": 0
    },
    "chunk_size": 0,
    "media_id": "string",
    "offset": 0,
    "size": 0,
    "username": "string"
}