Is there a working solution example to this?
PollNow does not appear to be a valid SwisVerb for WPM/SEUM.
Invoke-SwisVerb : Verb Orion.SEUM.Transactions.PollNow: Not found
Schema documentation appears to be outdated as well because many of the properties are not valid. The only two verbs it lists are Unmanage and Remanage.