签名计算是按照这里的算法，测试过，按照第9项里的数据计算出的delivery_sign是对的。可就是使用自己的数据一直报“签名校验失败”，请问哪里出了问题

POST 数据：

{

"appid": "wxe70f147b350ab5b4",

"shopid": "M20283590539",

"shop_order_id": "A2303100000278C",

"shop_no": "2709286",

"delivery_sign": "429e5b7494be4692e3be613daa0f9fd19e3bcd09",

"delivery_id": "SS",

"openid": "oibbx5eIwDkt21aMzO2DLEi_M0l0",

"sender": {

"name": "米柚蛋糕店",

"city": "南京市",

"address": "栖霞区",

"address_detail": "学衡路1号九霄梦天地A栋804",

"phone": "13813982546",

"lng": 118.91715,

"lat": 32.092545,

"coordinate_type": 0

},

"receiver": {

"name": "沐沐",

"city": "南京市",

"address": "江苏省南京市栖霞区文枢东路1号仙林科技城仙林医院(学思路店)",

"address_detail": "A804",

"phone": "18101274651",

"lng": 118.90864,

"lat": 32.096478,

"coordinate_type": 0

},

"cargo": {

"goods_value": 0.01,

"goods_weight": 1,

"goods_detail": null,

"goods_pickup_info": "",

"goods_delivery_info": "",

"cargo_first_class": "蛋糕",

"cargo_second_class": "蛋糕"

},

"order_info": {

"delivery_service_code": "1",

"is_direct_delivery": 1

},

"shop": {

"wxa_path": "/pages/my-orders/index",

"img_url": "https://media.imwatt.com/product/s/10200",

"goods_name": "商品",

"goods_count": 1,

"detail_list": [{

"goods_name": "软糯小甜点4英寸",

"goods_img_url": "https://media.imwatt.com/product/s/10200"

}]

},

"delivery_token": ""

}

返回数据:

{"resultcode":1,"resultmsg":"签名校验失败","fee":0,"deliverfee":0,"couponfee":0,"tips":0,"distance":0,"waybill_id":"","order_status":0,"finish_code":0,"pickup_code":0,"dispatch_duration":0,"sender_lng":0,"sender_lat":0}

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计算签名用的数据：

shopid:M20283590539

shop_order_id:A2303100000278C

app_secret:IXm************dlDPmSGA2gZsaSRoF