请求URL：https://api.mch.weixin.qq.com/v3/marketing/busifavor/stocks/{stock_id} 返回结果为：{"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"GET","sign_message_length":97,"truncated_sign_message":"GET\n/v3/marketing/busifavor/stocks/1266900000000002\n1589180755\n6b9a16afe12540419d36d405fa2ff5a0\n\n","url":"/v3/marketing/busifavor/stocks/1266900000000002"}},"message":"错误的签名，验签失败"}

/v3/marketing/busifavor/stocks创建商家券接口签名失败 {"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":666,"truncated_sign_message":"POST\n/v3/marketing/busifavor/stocks\n1588831998\n5Afb2B5p7FhozHSWTIcPKoONS2sMw96M\n{\"stock_\n","url":"/v3/marketing/busifavor/stocks"}},"message":"错误的签名，验签失败"}

/v3/marketing/busifavor/stocks创建商家券接口签名失败 {"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":666,"truncated_sign_message":"POST\n/v3/marketing/busifavor/stocks\n1588831998\n5Afb2B5p7FhozHSWTIcPKoONS2sMw96M\n{\"stock_\n","url":"/v3/marketing/busifavor/stocks"}},"message":"错误的签名，验签失败"}

调用 https://api.mch.weixin.qq.com/v3/marketing/favor/media/image-upload 返回的信息为 {"code":"SYSTEM_ERROR","message":"系统繁忙，请稍后重试"}