Here's an (php) example of creating an Event and pushing it to MailChimp. Anybody knows how this can be accomplished using C# and MailChimp Net V3?
PHP-example: https://mailchimp.com/developer/marketing/guides/track-outside-activity-events/#create-an-event
I've found a way, though you'll need to create a new Logic class.
Then you just need to instantiate it, and create the event.
NB, I haven't looked into the response contents...