dynamicscrm-api/lib/templates/api_update.xml

Pure SOAP module that allows to invoke Microsoft Dynamics CRM Online services

<s:Body>
   <Update xmlns="http://schemas.microsoft.com/xrm/2011/Contracts/Services"  xmlns:b="http://schemas.microsoft.com/xrm/2011/Contracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:c="http://schemas.datacontract.org/2004/07/System.Collections.Generic">
      <entity>
         {requetbody}
      </entity>
   </Update>
</s:Body>