An announcement as stored (snake_case columns).
idstringrequiredtitlestringrequiredbodystring or nullrequiredlink_urlstring or nullrequiredlink_labelstring or nullrequiredaudience_plansarray of enumrequiredOne offreecollectorpro
starts_atstringrequiredends_atstring or nullrequiredcreated_bystring or nullrequiredupdated_bystring or nullrequiredcreated_atstringrequiredupdated_atstringrequired