Log into the admin
Navigate to Catalog > Playlists
Select the ‘Plus’ icon on the right hand side of the page
In the ‘Create playlist’ panel fill in the details for the playlist fields (title is required)
Press save
Log into the admin
Navigate to Catalog > Tracks*
Search for the track(s) in question
Select the track(s) you want by selecting the checkbox to the left of the track play icon (multiple tracks can be selected)
On the right hand side of the page, select the folder icon
In the right hand selection panel, select projects
Find the project you’d like to add the tracks to
*If you’re wanted to add tracks from a particular release, navigate to Catalog > releases, search for the release name, click on the eye icon to see the track listing and continue the process above