Webhook API - playback status

[podonnell]

Support for SeriesId was added but not added to the README.

This is the file that adds all of the properties as some are missing from the README: https://github.com/jellyfin/jellyfin-plu...Helpers.cs

Thanks for this. Going to look through, but any idea if there is a variable that would capture a series/movie thumbnail? ItemID worked for movies but was just grabbing episode thumbnails instead of series thumbnail.