以下是我的待签名内容： POST /v3/apply4subject/applyment 1582776342 202002271205420691109864060 {"busine ","url":"/v3/apply4subject/applyment"} 或者 POST /v3/apply4subject/applyment 1582776342 202002271205420691109864060 {"busine\n","url":"/v3/apply4subject/applyment"} 或者将POST改成GET，这四种情况都不行。 以下是返回的错误信息： {"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":2756,"truncated_sign_message":"POST\n/v3/apply4subject/applyment\n1582776342\n202002271205420691109864060\n{\"busine\n","url":"/v3/apply4subject/applyment"}},"message":"错误的签名，验签失败"}

问题：我在做在做“”“商户开户意愿确认”的时候报了如下错：{"code":"SIGN_ERROR","message":"Http头Authorization值格式错误，请参考《微信支付商户REST API签名规则》"} <<微信支付商户REST API签名规则>> 这个规则在哪里，能否给一个文档地址的链接？接口规范中并没有指出要上送Authorization？