Invalid Arguments : 验签出错，建议检查签名字符串或签名私钥与应用公钥是否匹配，网关生成的验签字符串为：app_id=2019090867125087&biz_content={"out_trade_no":"DD8777411","total_amount":"5.00","subject":"\u4ed8\u8d39\u5165\u6280\u672f\u4ea4\u6d41\u7fa4","body":"\u4ed8\u8d39\u5165\u6280\u672f\u4ea4\u6d41\u7fa4","timeout_express":"1h"}&charset=utf-8&format=JSON&method=alipay.trade.precreate&notify_url=https://dl.it1024.com.cn/system/dmpay/pay/js/hd.php&sign_type=RSA2&timestamp=2026-04-30 13:23:43&version=1.0 付费入技术交流群
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