Brakes creaking? What’s the spring the encircles the drum for ? 57 Belvedere

Brakes are like new but when I get near a stop I get this weird creaking. I thought it might be the hubcaps so I removed them, still there. Seems mostly coming from the front right (pass). I bled the brakes and re-adjusted them thinking one wheel cylinder was hanging up. Still there. Maybe the shoes need breaking in?