Listing monitor for one business (?domain=): whether it is monitored (every domain on an active licence, re-read about once a day), when it was last read, and - for the licence holder or owner - the history of changes (listing added or removed, a field a listing prints changed, an audit finding opened or resolved). Each change also goes into /api/v1/changes (section listings), the change stream and the licence webhook. Signed (crawlcheck-business-monitor).