minecraft-packets/minecraft-packets/data/pc/1.14.4/from-server/multi_block_change/2.json

An easy way to query PrismarineJS/minecraft-packets

{
  "chunkX": 1,
  "chunkZ": 5,
  "records": [
    {
      "horizontalPos": 58,
      "y": 19,
      "blockId": 42
    },
    {
      "horizontalPos": 75,
      "y": 19,
      "blockId": 42
    }
  ]
}