S!ayer on Nostr: what is "layer 1" ?

{ "id": "5e255dff5443cb8089a7edcaaac2bd3b11755c9c4bec8658b4faaab6abd8dfb8", "pubkey": "cdecc31c6d9406e9a7d6b0067412aa661d9d31c8035c3fd65c06301d1cac3b92", "created_at": 1726489443, "kind": 1, "tags": [ [ "e", "603daef46dbf41ad6d1a1a5d04616bbad7e5a693f89467da555e5ca1b95557a8", "", "root" ], [ "e", "603daef46dbf41ad6d1a1a5d04616bbad7e5a693f89467da555e5ca1b95557a8", "", "reply" ], [ "p", "7c765d407d3a9d5ea117cb8b8699628560787fc084a0c76afaa449bfbd121d84", "", "mention" ] ], "content": "what is \"layer 1\" ? https://image.nostr.build/d2cd4964f2270028d7552e98fbd79e314fbc34191cd9e7f76e714eb5483744f9.jpg", "sig": "0deb0ea7ed02ba391e219edcbe5119f123bafa69b99ebdc0ead1f6dffc54ad23520a7cb7f1dd843d6f6a4a2823363b0fa17007ca85bf1168f58a153eba932fd9" }