ItemListItem(ItemListItem)

{
    "id": "501",
    "external_id": "ITEM-1001",
    "inv_type": "service",
    "code": "REF-410A",
    "description": "R-410A refrigerant cylinder (10 kg).",
    "purchase": 95,
    "sales": 120.5,
    "tax": "tax",
    "klass": {
        "id": "201",
        "external_id": "IC-1001",
        "name": "HVAC Parts"
    }
}