DeviceOtaUpgradeResp(DeviceOtaUpgradeResp)

{
    "firmware": {
        "version": "string",
        "name": "string",
        "desc": "string",
        "isDiff": 0,
        "signMethod": "string",
        "extra": "string",
        "files": [
            {
                "size": 0,
                "name": "string",
                "fileUrl": "string",
                "fileMd5": "string",
                "signature": "string"
            }
        ]
    }
}