wrong on Nostr: What are brc-20?

{ "id": "8a1765bd23e7db8354ec607fe4f56365ec28d4119d190a28aa691dec71d7e58d", "pubkey": "443f53146ce28a45abf016b054484cc6d111c9c286fb25b64dec89ad37c12d15", "created_at": 1683902467, "kind": 1, "tags": [], "content": "What are brc-20?", "sig": "2848355a7c77d93bccb51d5d87352ff8e2fde7445e996b72e2e57e07edbce847f823dc76db50c047e2583b619a4e3d99de56bf9636f9f9853e9b8e1ba1f128f4" }