create table update_events (
  tracking_id text not null,
  payload text not null,
  audit 
);
comment on table update_events is '
  Updates one or more data fields.
';

comment on column update_events.tracking_id is '
  A unique id, which identifies the association of multiple events. This can i.e. be a user guid, for events related to a user. It is important, that this id is unique and immutable.
';
comment on column update_events.payload is '
  One or more fields defined in the reporting schema, which will be updated.
';
comment on column update_events.audit is '
  Audit information about this event.
';