nobody on Nostr: What client is that?

{ "id": "91f15a4b80f29ce44dd2fae7041dce88e519e884011302ff5d7c467fe8480bd9", "pubkey": "705b09857d99e15f704061b9d3da300d530304edfe3a2caa08b954ca8236b2c6", "created_at": 1684588847, "kind": 1, "tags": [ [ "e", "6e4ead6435093b64b6d89e11fd416d2a3fef22872402c1e2f880a2db886a3f01" ], [ "p", "980d1fa6460d817c5a3640dabb5e78625392d7fe00f21d256ea9661bcf6e2c04" ] ], "content": "What client is that?", "sig": "893e81272a1e81aafd84dc8e0aad19c31b09a93c75577cc593af672b0a55bfed0b1f51006fe6bb979790e3e14caf25f2cef3a8450343de60a5976274ac5e4de1" }