minecraft-packets/minecraft-packets/data/pc/1.9.4/from-server/named_sound_effect/1.json

An easy way to query PrismarineJS/minecraft-packets

{
  "soundName": "minecraft:ambient.cave",
  "soundCategory": 5,
  "x": -644,
  "y": 560,
  "z": 1940,
  "volume": 1,
  "pitch": 63
}