// a new method in AuditQueryCreator
AuditQuery query = getAuditReader().createQuery()
    .forRevisionsOfEntityAndChanges(MyEntity.class, true);
List result = query.getResultList();
for (Object row : result) {
    Object[] arrayRow = (Object[]) row;
    // there is no sense to check modified properties for ADD and DEL revision types
    if (arrayRow[2] == RevisionType.MOD) {
        // for MOD revision type there is an extra element in returned array
        Set<String> modifiedProperties = (Set<String>) arrayRow[3];
        ...
    }
}