Leo on Nostr: What client is this?

{ "id": "624136a6bfdbc26dc63945eb97004496c3913138c301bf78b365a3a289268f64", "pubkey": "f5c815e68e2cccdcf11378b6846731e7f9aed04f7011139999c7986977eaedbf", "created_at": 1671129866, "kind": 1, "tags": [ [ "e", "ccf67815a8a4951dbe877d02622157e2d54893e07f0636cd51c5087b0257b586", "", "reply" ], [ "p", "c5cfda98d01f152b3493d995eed4cdb4d9e55a973925f6f9ea24769a5a21e778" ] ], "content": "What client is this?", "sig": "97cb6c36751234e30c1f4431d413a3561c10f6df8e9910e5011d542b9bc996b65255aed842a4df1fb937937ddf7598c08fb29a876cdbb6643219296d08cac322" }