ownerArg : An object this event refers to (i.e vApp)
serviceNamespaceArg : a string identifying the service generating the event (i.e com.vmware.vco)
successArg : a boolean (true for success, false for failure)
typeFullArg : a string indicating the event details
userArg: a vCD user object reference
Also note that the action returns a VclEvent object.
To create the event use the createEventAdminOrg action with passing an admin org and the vclEvent you created.