contract2.gm

{
  "name": "rmmodule",
  "base": "",
  "fields": [
    {
      "name": "entity_id",
      "type": "uint64"
    },
    {
      "name": "module_index",
      "type": "uint8"
    },
    {
      "name": "target_ref",
      "type": "cargo_ref?"
    }
  ]
}