K on Nostr: What’s nf?

{ "id": "bdf85898af465d6c7b40e441fa49df77ac968ed18e9fe0d12df8a49b77a0186b", "pubkey": "b0b50f04ba16989130dff665a2efae7333a2653e7a715206c5de3e2d932e8529", "created_at": 1689260775, "kind": 1, "tags": [ [ "e", "0761e8a17c471f823fbabef5f6963a37a18fba0969b0f09023f99b273379ed6a" ], [ "p", "ca88a80c73f557c1e5e9081de638ec97a9f4df5a91bde9f6968cd300d79ab3e0" ] ], "content": "What’s nf?", "sig": "0bc697ef9e7829d32d6bf7511b1d30d787797f595f56d6698734a4cf33496ba9e370afcffe6b01554b1b1ef63c2b0659540d7a025a8b8b28c7f1352053272707" }