ck on Nostr: What is this?

{ "id": "5cc96e49202fc457e5594cef61ed0fa531c35edbe50f1a6e817285a64d90f2a2", "pubkey": "c2622c916d9b90e10a81b2ba67b19bdfc5d6be26c25756d1f990d3785ce1361b", "created_at": 1677557522, "kind": 1, "tags": [ [ "e", "8f1dcdf8adcf76501dfc6580232c7f01867b03c1795f9dcad6da7521e436d899" ], [ "p", "1989034e56b8f606c724f45a12ce84a11841621aaf7182a1f6564380b9c4276b" ] ], "content": "What is this?", "sig": "a4b6cb615883b302fff8734387a0c07d5f1f06f884f8a9f27132dfc7ecac44829bc4b73e47c8836a3cc5d24b2bff433f222449868670a5181394f4e09398ed50" }