Nostr, what is this? This pops up in my notification implying some media is playing but the app is not even open on my device. 
https://image.nostr.build/76ca6d354b0962c3e98987b32f0655c5a92a2adefa65011aad53eefb71fa39f8.jpg#m=image%2Fjpeg&dim=512x260&blurhash=i55%7Dpy_3%25MozNGM%7B009ZD%25%7Eq%3Fb%25Mo0M%7BIUITD%25D%25xb-%3BtRWVRjRj-%3BRkIUbHofWBRQRjkCxuxas%3At6M%7BIUIUWBxaM%7B%25M%25M&x=f908ec0e56d948c4f3af5d954f8cf87175686c88eaed4f04a6d2ea3266c66dab