SetAVTransportURI.xml

<?xml version="1.0"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <s:Body>
    <u:SetAVTransportURI xmlns:u="urn:schemas-upnp-org:service:AVTransport:1">
      <InstanceID>0
      </InstanceID>
      <CurrentURI>
      </CurrentURI>
      <CurrentURIMetaData/>
    </u:SetAVTransportURI>
  </s:Body>
</s:Envelope>

<!--
Orignal header from captured packets.

POST /smp_18_ HTTP/1.1
Host: 192.168.219.6:7676
SOAPAction: "urn:schemas-upnp-org:service:AVTransport:1#SetAVTransportURI"
Accept-Language: en-us;q=1, en;q=0.5
Accept-Encoding: gzip
Content-Type: text/xml; charset="utf-8"
User-Agent: gupnp-av-cp GUPnP/0.20.12 DLNADOC/1.50
Connection: Keep-Alive
Content-Length: 1405
-->