minecraft-packets/minecraft-packets/data/pc/1.15.2/from-server/player_info/3.json

An easy way to query PrismarineJS/minecraft-packets

{
  "action": 1,
  "data": [
    {
      "UUID": "56825bf2-67f6-3755-b1bf-e6c96cad3411",
      "gamemode": 0
    }
  ]
}