npub1qd…mgfw3 on Nostr: what is this

{ "id": "a2b326d2a711e729351420dc30af007bebbabbe97a20067184244f94daa1d734", "pubkey": "03612b0ebae0ec8d30031c440ba087ff9bd162962dffba4b6e021ec4afd71216", "created_at": 1756922473, "kind": 1, "tags": [ [ "client", "Nostur", "31990:9be0be0fc079548233231614e4e1efc9f28b0db398011efeecf05fe570e5dd33:1685868693432" ] ], "content": "what is this https://mempool.space/stratum", "sig": "0ab80100e5c7b45bd7b468741e81126d1546e83acabb188740d3af643522a808775cbdeb1f2727c374fed4dea57ee9d8d6ea1e4d23fb2d6f76afb6ec29da07e0" }