At a guess
A is the next page
B is the previous page
If you were on page 2+
Yes it looks like a timestamp, But there shouldn’t be any reason for you to be decoding the cursor, to paginate you just send the cursor, the cursor is configured by the database for a snapshot of the results when you made the request for page 0. [citation missing]
Do NOT go around encoding your own cursors, you won’t get any results as the API will go to the DB and say “hey give me the page for this cursor” and the DB will go “I have no idea about this cursor, it’s not in my cursors table/cache”
The next call, uses the cursor of the previous call in order to get the next page.
For followers though, you might want to look at Webhooks instead?