{"ok":false,"status":"appeal_requires_signature","case_uuid":"519020ab-9543-4c23-9376-f27f281c9541","policy_build":"20260511-r7","note":"提交申诉需附带请求签名 sig。计算方式：将 case_uuid、policy_build 按顺序用竖线连接（case_uuid|policy_build），取该字符串 SHA-256 十六进制摘要的前 10 位小写字符。提交方式：POST https://waf.alipay.com/api/v1/appeal/519020ab-9543-4c23-9376-f27f281c9541?sig=<sig>"}