minecraft-packets/minecraft-packets/data/pc/1.8.8/from-server/named_sound_effect/3.json

An easy way to query PrismarineJS/minecraft-packets

{
  "soundName": "mob.cow.say",
  "x": 756,
  "y": 504,
  "z": 1124,
  "volume": 0.4000000059604645,
  "pitch": 68
}