The ISPW action, possible values -

CreateAssignment
GetAssignmentInfo
GetAssignmentTaskList
GenerateTasksInAssignment
PromoteAssignment
DeployAssignment
RegressAssignment
GetReleaseInfo
GetReleaseTaskList
CreateRelease
GenerateTasksInRelease
GetReleaseTaskGenerateListing
GetReleaseTaskInfo
PromoteRelease
GetSetInfoAction
GetSetTaskList