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

An easy way to query PrismarineJS/minecraft-packets

{
  "chunkX": -1,
  "chunkZ": 7,
  "records": [
    {
      "horizontalPos": 3,
      "y": 58,
      "blockId": 208
    },
    {
      "horizontalPos": 4,
      "y": 58,
      "blockId": 208
    }
  ]
}