Found dog: brown Labrador with blue collar

Hey there, I found a dog this afternoon around 4:15pm wandering near the Publix on Oakland Park Blvd in Oakland Park. It's a medium-sized brown Labrador mix, about 50 pounds, with a bright blue reflective collar and a bone-shaped ID tag that says 'Rex'. The fur is a bit muddy from the rain, and there's a tiny white heart-shaped patch on his chest. He seems friendly, responsive to his name, and he doesn't have a microchip in my quick scan. I'm hoping to reunite him with his person; please reach out if this is yours, I can bring him to a safe spot while we figure things out.