按道理不是该收到以下这样的xml么？

<xml>
  <ToUserName><![CDATA[toUser]]></ToUserName>
  <FromUserName><![CDATA[FromUser]]></FromUserName>
  <CreateTime>123456789</CreateTime>
  <MsgType><![CDATA[event]]></MsgType>
  <Event><![CDATA[subscribe]]></Event>
</xml>

为什么我收到的body是乱码。 还有，能让他传json么？

"body":"PHhtbD48VG9Vc2VyTmFtZT48IVtDREFUQVtnaF8wOTRjZjgxNmViOTRdXT48L1RvVXNlck5hbWU+CjxGcm9tVXNlck5hbWU+PCFbQ0RBVEFbb3V0VzA2c0tvQkVNR1d0Zl96eXVacEVZdHJ6c11dPjwvRnJvbVVzZXJOYW1lPgo8Q3JlYXRlVGltZT4xNzE5OTk2NjcyPC9DcmVhdGVUaW1lPgo8TXNnVHlwZT48IVtDREFUQVt0ZXh0XV0+PC9Nc2dUeXBlPgo8Q29udGVudD48IVtDREFUQVtzaGl5YW5dXT48L0NvbnRlbnQ+CjxNc2dJZD4yNDYyNDQzMjEyOTI0MTA5NjwvTXNnSWQ+CjwveG1sPg==",