SwisClient methods (invoke, update)

Are there any examples showing how to update tables?   I'm simply trying to push comments or notes inside the Orion.AlertObjects.AlertNotes field.  I see in that table a relationship with  (Orion.AlertActive) that has a verb 'AppendNote'  I can invoke.  If I have the syntax right:

AppendNote  ( alertObjectIds(System.Int32[], note(System.String))

I attempt in python:

aliases = swis.invoke('Orion.AlertActive', 'AppendNote ', '6220','TEST')      #  I just hardcoded  alertObjectId that I know exists and  string I want to add

print(aliases)

But I get:

Traceback (most recent call last):

  File "./check.py", line 67, in <module>

    aliases = swis.invoke('Orion.AlertActive', 'AppendNote ', '6220','TEST')

  File "C:\Python27\lib\site-packages\orionsdk\swisclient.py", line 29, in invoke

    "Invoke/{}/{}".format(entity, verb), args).json()

  File "C:\Python27\lib\site-packages\orionsdk\swisclient.py", line 59, in _req

    resp.raise_for_status()

  File "C:\Python27\lib\site-packages\requests\models.py", line 909, in raise_for_status

    raise HTTPError(http_error_msg, response=self)

requests.exceptions.HTTPError: 400 Client Error: Verb Orion.AlertActive.AppendNote : Not found for url: https://solarwinds-orion:17778/SolarWinds/Info

rmationService/v3/Json/Invoke/Orion.AlertActive/AppendNote%20

What am I missing??