开发者工具没有问，但公众号跳转就报错

签名参数 appid=wxa2f1e7d09f73db19&body=充值&mch_id=1537087591&nonce_str=96ec808a7332b16c55cc62f6e64abcd2&notify_url=http://sae.dhgjcloud.com/weixinPayNotifyUrl&openid=ocHgk1Z7o8pSPOUk7Ei5rRh_JHQg&out_trade_no=EC465579933503336448&spbill_create_ip=192.168.0.43&sub_appid=wxa2f1e7d09f73db19&sub_mch_id=1593147061&total_fee=10000&trade_type=JSAPI&key=*** 发送参数 {"appid":"wxa2f1e7d09f73db19","body":"工匠云充值","mch_id":"1537087591","nonce_str":"96ec808a7332b16c55cc62f6e64abcd2","notify_url":"http://sae.dhgjcloud.com/weixinPayNotifyUrl","openid":"ocHgk1Z7o8pSPOUk7Ei5rRh_JHQg","out_trade_no":"EC465579933503336448","sign":"4D3AB5DD97035E0053CC741CD87C52A95F079D206C1DBE794F11474FE27CFFC1","spbill_create_ip":"192.168.0.43","sub_appid":"wxa2f1e7d09f73db19","sub_mch_id":"1593147061","total_fee":"10000","trade_type":"JSAPI"} 返回结果 <xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[签名错误]]></return_msg> </xml>