Modifying video addedAt/lastViewedAt timestamp?

I am working on a PLEX plugin that imports SageTV recordings into PLEX.

 

Is there a PLEX web api that allows one to explicitly set the addedAt or lastViewedAt timestamp for a video?

 

When a library is added, all the TV shows that gets added to PLEX uses the current time for when the show is added. This makes sense as this is when the video is technically 'added' to PLEX. 

 

But it makes more sense if I can set the time to when the video is actually recorded. This way, the recently added deck view in PLEX would show only recent recordings, not everything from Sage collection which might contain hundreds of shows some of which might be quite old.

 

Is there a PLEX API that can allow one to set such date?

 

Also is there a way to explicitly set the last watched time? Right now this gets updated whenever I explicitly set a resume position. It'll be nice if I can synchronize this timestamp with Sage.

 

Thanks!