Its not a typo. The key to be added as part of request body is com.ibm.snx_profiles.base.givenNames
So the variable name is sample.createProfileGivenNames
http://www-10.lotus.com/ldd/appdevwiki.nsf/xpDocViewer.xsp?lookupName=IBM+Connections+4.0+API+Documentation#action=openDocument&res_title=Adding_a_profile_using_the_Administration_API_ic40a&content=pdcontent