lost my tracks / HOMEPORT

Hi everyone,
I'm so sorry to ask but I'm stuck in search for the space on my macbook to find the file mycollection.
I lost my data and would like to restore it from timemaschine.
bevor it, I have to know wehre homeport store the tracks.
im unsers/ ..myname../ library etc.etc. I can't find any data.

how to procedure?
thanks, iGreg