<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:inf="UPRS/Datatypes/Infrastructure" xmlns:mes="UPRS/Services/IBalance/Messages" xmlns:dat="UPRS/Datatypes">
   <soapenv:Header>
      <inf:RequestContext>
         <inf:requestID>00000001</inf:requestID>
      </inf:RequestContext>
   </soapenv:Header>
   <soapenv:Body>
      <mes:GetBalanceRequest>
         <mes:subscriber>
            <dat:msisdn>12345678</dat:msisdn>
         </mes:subscriber>
      </mes:GetBalanceRequest>
   </soapenv:Body>
</soapenv:Envelope>