l.rplanet

{
  "name": "upgrade",
  "base": "",
  "fields": [
    {
      "name": "owner",
      "type": "name"
    },
    {
      "name": "land_id",
      "type": "uint64"
    },
    {
      "name": "elements",
      "type": "symbol_code[]"
    }
  ]
}