POST /MemberManagementService HTTP/1.1 Host: www.membermanagementserver.com Content-Type: text/xml; charset="utf-8" Content-Length: nnnn SOAPAction: "http://www.imsglobal.org/soap/mms/replaceMemberships" AB12345e4t6789 oldsource:oldidentifier1 oldsource:oldidentifier1 Person Mentor Dumbledore@hoggsworts.ac.uk oldsource:oldidentifier2 oldsource:oldidentifier2 Person Mentor Dumbledore@hoggsworts.ac.uk