You need to subscribe to the Release Radar playlist for this to work, and then select it in the trigger. Every friday, when that list is updated, a new playlist will be created with the songs that were just added.
If
New track added to a playlist
This Trigger fires every time a new track is added to a playlist you specify.
Then
Add track to a playlist
This Action will search for a track and add the first result to a playlist you specify.
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