The ability to support nanoseconds (ns) for event acknowledges would help when you may add multiple event messages within the same second; this would enable the displaying them in the correct order, rather than alphabetical if they are received in the same second.

Along with this it would be useful to be able to specify clock/ns so that you are able to specify the timestamp you may actually want, rather than the time of the api call; this would for example be used when you may have some automation that annotates messages for events.