返回数据成功，但是接口返回请求签名非法

[yilei63]

扫码调用接口后返回json:{{
"alipay_trade_precreate_response": {
"code": "10000",
"msg": "Success",
"out_trade_no": "12312344132135414",
"qr_code": "https://qr.alipay.com/bax02202xexotzjwjsu800c9"
},
"sign": "QHq5ZWN10UoJtdkQI+Q9KwEf5Ok1yEIyE8T5iQ/EURmP0NgRCfg34wINjVpZMCEpOO8frVsqXo6OU8NfDXD0L1dlmFdg+GFIGyOIKR7Q9D9d5Ff6J0FLKpbI0yCDW6drDbL30uzeEw46e8voNFoM/Wm+yxG5gXMQrPmmECyLjSaf9XcWlxAB0L1tKJV+6CBsZHI/cp5NpE1vsJ4vGLjIKk+kM/Qp9w/P0kWTZ9R4KrEYbF43MEbxzOdNXWrjHs8Frl4uC3A5yGY63Jw1uPv/gzlXRauKB7vbo102UlVNcP/1Xo8uM2wqjq53Ai+wV0RvgM9ngsdNUUJQE0+jrywcyw=="
}}
从数据看已经成功，但是接口返回的是请求签名非法