PLAY

Method: POST
URL: http://192.168.2.100:1400/MediaRenderer/AVTransport/Control

Headers: 
Content-type: text/xml;charset="utf-8"
SOAPAction: "urn:schemas-upnp-org:service:AVTransport:1#Play"

Body:
<?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:Play xmlns:u="urn:schemas-upnp-org:service:AVTransport:1"><InstanceID>0</InstanceID>,<Speed>1</Speed></u:Play></s:Body></s:Envelope>


VOLUME

Method: POST

URL: http://192.168.2.100:1400/MediaRenderer/RenderingControl/Control

Headers:
Content-type: text/xml;charset="utf-8"
SOAPAction: "urn:schemas-upnp-org:service:RenderingControl:1#SetVolume"

Body:
<?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:Stop xmlns:u="urn:schemas-upnp-org:service:AVTransport:1"><InstanceID>0</InstanceID>,<Speed>1</Speed></u:Stop></s:Body></s:Envelope>