库存更新：调用库存更新接口，接口返回成功，但是接口传1027，店铺后台仍然是73

请求报文如下：

"message":{

"diff_type":3,

"product_id":"10000140082014",

"num":1027,

"sku_id":"2436186007"

},

"url":"https://api.weixin.qq.com/channels/ec/product/stock/update?access_token=83_JXnfDAUkicU6QICHhjBlyDWaqN4_2ZUs9bRsJmQsj9kilRkTx8av3Y_AwTPC2c2T6hRCOk0ANS5O3knMwlc1RSQTYQUDqKeVMFBROB7ReTz9IFw0Sn6ocpyPyXy1g766zW9n2uKGpWghMXfMBHIjAEDEKL",

响应报文：

"message":{

"errcode":0,

"errmsg":"ok"

},