请求链接：https://api.mch.weixin.qq.com/papay/h5entrustweb?appid=XXXXXX&contract_code=wxe20200219163143000221386567&contract_display_account=Test&mch_id=1111111&notify_url=http%3A%2F%2Fhdhtest.nat300.top%2Fykdh%2Fpay%2FnotifyEntrust&plan_id=132201&request_serial=111001&timestamp=1582101105&version=1.0&clientip=112.231.71.180&sign=B6792347F115E4BE55293564163A64F46E3A2013CD789A01B79AAB36CDE8AA1D

sign校验在微信支付接口签名校验工具中也是通过的，但是返回的结果仍然是 SIGN_ERROR

<xml>

<return_code><![CDATA[SUCCESS]]></return_code>

<return_msg><![CDATA[]]></return_msg>

<result_code><![CDATA[FAIL]]></result_code>

<result_msg><![CDATA[SIGN_ERROR]]></result_msg>

</xml>