POST /nrc/control_0 HTTP/1.1
User-Agent: Panasonic iOS VR-CP UPnP/2.0
Host: 10.0.1.155:55000
Content-Type: text/xml; charset="utf-8"
SOAPACTION: "urn:panasonic-com:service:p00NetworkControl:1#X_SendKey"
Content-Length: 331

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
 <s:Body>
  <u:X_SendKey xmlns:u="urn:panasonic-com:service:p00NetworkControl:1">
   <X_KeyEvent>NRC_MUTE-ONOFF</X_KeyEvent>
  </u:X_SendKey>
 </s:Body>
</s:Envelope>