RtpReceiver: controlling the id attribute of the received track?

i am thinking about mapping
https://tools.ietf.org/html/draft-ietf-mmusic-msid-10

At the javascript level, the gist of this is (as I understand it) to allow
a correlation between SDP operations and onaddstream. For multiparty
applications (using plan B) I add a new msid in the SDP and sometime later
get an onaddstream and need some way to correlate that, in particular when
adding multiple new streams at the same time.

Now ignoring that with ORTC i'm in charge and don't get streams/tracks
popping up at random...
is there a way I can control the id of the Receiver's track? The track's id
is readonly so I can't change it.