Need help understanding the data content of AUDIT_EVENT table for AccessPolicy events -- OIM 12c

I applied the following query:

select EVENT_DATE,
       EVENT_VALUES_ADDED,
       EVENT_VALUES_REMOVED
from   audit_event
where  ENTITY_TYPE = 'AccessPolicy'
order by event_date desc
fetch first 10 rows only;

And got the following results:

EVENT_DATE                     EVENT_VALUES_ADDED        EVENT_VALUES_REMOVED
------------------------------ ------------------------- -------------------------
23-DEC-20 04.41.05.280000 PM   rowVer="[B@2cfc838c"      rowVer="[B@4219075"
23-DEC-20 04.41.04.587000 PM   rowVer="[B@68c9bcdb"      rowVer="[B@637444a5"
23-DEC-20 04.41.03.901000 PM   rowVer="[B@7f3c2835"      rowVer="[B@392e0064"
23-DEC-20 04.41.03.311000 PM   rowVer="[B@63bd418e"      rowVer="[B@23819139"
23-DEC-20 04.41.02.591000 PM   rowVer="[B@62242ef"       rowVer="[B@5a457daa"
23-DEC-20 04.41.01.987000 PM   rowVer="[B@c3bbe06"       rowVer="[B@43b1d8d6"
23-DEC-20