. on Nostr: What does that mean?

{ "id": "a27e7f78c8b7844be7f06019a0c7d20806c6409244f3fad5e64b47cd7c7cf096", "pubkey": "0c91eda29a091c6a7c7c9c8b4231e949c2847d72f97645b9e0ea449106ae05f3", "created_at": 1676600061, "kind": 1, "tags": [ [ "e", "c4229a2af9f461107962772653f0d0d731227e87842954c2a4f8f20fc34725a8" ], [ "p", "ec8f72ff2937c197cb0d032dae27bae073ae6a4e1bd2a8e2ef1578636b3595cb" ] ], "content": "What does that mean?", "sig": "d54e7769e6ae38e782a8c103c12dce9bfe511faa0cd000ccea8098ef4302c7c70d3f568c9c4dd39e9bbd1b46b5db11a372c3578e06bfd1fb92652e56c414ec09" }