Returns newest-first shout messages. Optionally filter by zone and since
timestamp, and paginate using before_id.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Optional shout zone filter (e.g. global, l402, dev).
64"global"
Number of records to return (default 50, max effective 200).
x >= 150
Pagination cursor: return rows with id lower than this value.
x >= 112345
Optional ISO-8601 timestamp for incremental polling.