Personalization With Segment ID and The User

Hello,
The method you shared us won’t work as there are more then 25 items which we give option for users to enable and this is for a specific audience. So we will be having a page in our site where people can select the items they want to be notified for.

So please tell us how can we register / trigger webpushr that user 1 has subscribed to ‘1123244’ Segment ID.

As mentioned if we do it in traditional push subscribe method it won’t work out.