啥是erp？

原始 JSON

{
  "kind": 1,
  "id": "418dc59ebf5a24d675de71eaf35ca8120b6b03533a15a2a2c29ef8b9d8c3ae96",
  "pubkey": "81913081246d192c9a55951704270756b222094470b3171e58bb5e3c42ee8db5",
  "created_at": 1787478428,
  "tags": [
    [
      "e",
      "12c452c62c4ae9f3c50c0b94240ff4833e91de4bc8e38cf21e06a2ac953aa4ce",
      "wss://relay.primal.net/",
      "root",
      "fd8bdf01a0e1f3d12612e6d6ff12dcccafe7571e188225fd45ccce4b062965b0"
    ],
    [
      "p",
      "fd8bdf01a0e1f3d12612e6d6ff12dcccafe7571e188225fd45ccce4b062965b0",
      "wss://relay.ditto.pub/"
    ],
    [
      "client",
      "Amethyst"
    ]
  ],
  "content": "啥是erp？",
  "sig": "ab842635926e9d5a871bba22a6f59ac104fb47a6b57d58601ee127c9a624dabba56e256695807461dee9db0b33ee90966a62536f451056ffa69a306b25c5f741"
}