What Base do I use to decode this message?

I've tried Base85 and Base64 and I'm unsure what else to try. I'm new to decoding things, Here's what I need to decode - U9GFzc3dvcmQ6IFpldGE9uClByb2NlZ9WQ=


It looks more like it's JPEG compression or some other type of file compression than a base encoding but with that little of the whole file, it's anybody's guess.