contract2.gm

{
  "name": "claimplot",
  "base": "",
  "fields": [
    {
      "name": "builder_id",
      "type": "uint64"
    },
    {
      "name": "target_item_id",
      "type": "uint16"
    },
    {
      "name": "coords",
      "type": "coordinates"
    }
  ]
}