aldy on Nostr: how to verify this ?

{ "id": "c4eaf0e6c89713e364a9ed69969039938a6fa25f263a9491b3082738c27452e8", "pubkey": "877cafe64b9f65aabc47f44e90b37f0f4dda607a6181c7a3d02ab0d23313c9fa", "created_at": 1671640711, "kind": 1, "tags": [ [ "client", "astral" ] ], "content": "how to verify this ?", "sig": "e2c2b45e4552cc203b103d95b064f429c3bc2aa3b4d8b0a84f239b85e4025dca7cef587c076aea391415f8bdf9957de997ecbaeba7d008996e195d93ff524c3d" }