{"ok":false,"status":"appeal_requires_signature","case_uuid":"502deeec-d613-4d2d-a586-9f946376313b","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/502deeec-d613-4d2d-a586-9f946376313b?sig=<sig>"}