{"hint":"裸 GET 诊断页。企业微信回调必带 msg_signature，会走正常验签流程，不影响真实回调。对比 tokenHead/tokenTail、aesKeyHead/aesKeyTail 与后台字段首尾4位即可确认是否一致。","hasToken":true,"tokenLen":11,"tokenHead":"r2OJ","tokenTail":"3CGA","hasAesKey":true,"aesKeyLen":43,"aesKeyHead":"CT46","aesKeyTail":"8W3l"}