收到的回调包内容：req: {"encrypt":"%A0%A0%EER%F0%13%8D%1C%5E. NT%FD%9E%14%DD%90%F5%D3%A5%25(%C3%E2%EBN%BE%DE%11%8B%8B%E4%DD%AB%9F%96jH%04%D7%AEm%80%CEz%F7%96%BC%C2%A8c%86%17%8F%F7%D8%FB%D5z5_%B7%BC%92%1C%DF%F6%E4%A9%D4%9C%FF%B1nQe%EF%1A%19%E1%D3%9A%0BdU%D9%EF%CDME%ACj%A0%DB%B6%93%06%C6%BCQ%05%0Cb%FE%60%D7%E8%C28%ED%5B%10%EA%BE%23%FF%B3%93%08%83%E2S%CE%07%1F%AB%CF_%B2 %92%DD%C5'%CB%3F%00%3C%D7%B6%86%EF%FF%BA%F2%0C%A98%40~%B2%BF%7C%B4LYr%07w","nonce":"1689195302","signature":"b49c5adf462fa434733027141d04533ef848b14ddcb0e7c7a64ac84a0c3d2b87","timestamp":"1766130357417"} 

问题描述：这个是接入广告防作弊收到的回调内容，两个问题：1我按文档上的签名方法签名不通过，2对encrypt字段进行url解码直接报错提示格式错误，请问为什么？文档说明如下图：