API call to have a user watch specific category(ies)?

I’m not sure if this code can accomplish what I’m looking to do, but…

I’d like to add a hyperlink that would have some kind of URL parameter that when a user clicked the link, they would be Watching/Tracking/Normal/Muted for a particular category.

Practical use case would be instead of me telling folks to Visit the category… and click the bell icon and choose _____… I could say something like…

CLICK HERE if you want to be notified whenever a new post is added to this forum.

Then, when the users clicks that hyperlink, they are subscribed at the level we define, in the url parameter.