失败原因:SYSTEM_ERROR&midas_err_code=1003-600001-35506 rid: 69d77ede-31497b88-6e620394； 纯签约的模式下，签约成功后，发起订阅扣款会报以上错误；签约和订阅扣款发起的间隔会有要求吗，目前测试只隔几分钟。

请求如下：

{

  "client_id": "110",

"uniq_id": "ASad78692ffe64468d267dba37",

  "user_id": "***bd413b114ec056a124767",

  "total_amount": "49.00",

  "contract_code": "***26040918104818110d6b1ff5b",

  "notify_url": "**********", // 隐藏

  "attach_data": {

    "userId": "***bd413b114ec056a124767",

    "orderNo": "ASad78692ffe64468d267dba37",

    "svc": "qxb_mp_wx"

  },

  "sign": "***cb648ba13a4d7f64fbebdda024e6"

}