bind_openid=false

"cardId":"pq_9ut4axNBfYdB5Q23XXVDxXb0c",
"cardExt":"{"code":"19112610443261715309","timestamp":"1574736272","nonce_str":"H9JTE3F9GUCQJ7AJN4J7PFGB5RXFQKUJ","signature":"2b4a9ebaabdf2a0d948c726a9e895963f28dae02"}"

验签工具得出的签名也是对的