Unfollow: 

POST /api?signature=ed32de69a7977a8468ca72fa45125a6506cc2cde&timestamp=1492790658&nonce=644867704&openid=oUN420bxqFqlx0ZQHciUOesZO3PE&encrypt_type=aes&msg_signature=00db32d3a36e80969c65d6ff94d85b73dfdede43 HTTP/1.1
Host: wechat.hitxy.org.au
Accept: */*
Cache-Control: no-cache
Connection: Keep-Alive
Content-Length: 770
Content-Type: text/xml
Pragma: no-cache
User-Agent: Mozilla/4.0
X-Forwarded-For: 103.7.30.105
X-Forwarded-Host: wechat.hitxy.org.au
X-Forwarded-Server: wechat.hitxy.org.au

<xml>
    <ToUserName><![CDATA[gh_f09231355c68]]></ToUserName>
    <FromUserName><![CDATA[oUN420bxqFqlx0ZQHciUOesZO3PE]]></FromUserName>
    <CreateTime>1492790658</CreateTime>
    <MsgType><![CDATA[event]]></MsgType>
    <Event><![CDATA[unsubscribe]]></Event>
    <EventKey><![CDATA[]]></EventKey>
    <Encrypt><![CDATA[brFRc2b7iWU+sxTJfQ1Alp+GcR69Wkeh6Bb88z6XP/q8feWBbvo1odwZ97WrPV5UE2ctrzY88F0J5gt1ECX6OgcKMtZQiZgucXwsh53N9jyDRV+j6zJ1kpJiAf0UxUV7B0Q6OEX830Exoaylj9ZwoR1iQL84eB8CSVmUHRGNxqMK5hg6frE65guh9WysbIs2MWvHVXo7FsXj7ipK9s2VNqawR0VctKPxSnjAPjIxu2Q9MQXnhegePbuLnjTfW2YyY0cKx4XU+tvKlnQbwGgw4rxmcOjuF5lkknxK6JefeHtnKXTiXgcRmEtcbVneWxfW5FsUQkIDQa62IuTs/m4THZDc4opvLmOFXgUR9+BBnIVXyUNvt8zm9DDUUTd+rGz0SDx6sQ3S6WxITp7HKAR6wEHf+eSEwquzmSrGfgAR9Vs=]]></Encrypt>
</xml>