{
    "type": "c2cCdnDown",
    "params": {
        "robotId": "当前机器人微信ID",
        "instanceId": "实例id 和 robotId 二者填一者就可以",
        "fileType": 2,
        "fileSize": 0,
        "aesKey": "string",
        "fileId": "string",
        "savePath": "string"
    }
}
{
    "type":11170,
    "data":{
        "aes_key":"{{params.aesKey}}",
        "file_id":"{{params.fileId}}",
        "save_path":"{{params.savePath}}",
        "file_size":968802,
        "file_type":"{{params.fileType}}"
    }
}