WDJ service

{
    "id": "string",
    "name": "string",
    "internal_number": "string",
    "barcode": "string",
    "unit": {
        "id": "string",
        "name": "string",
        "description": "string"
    },
    "quantity": 0,
    "unit_price": 0,
    "unit_cost": 0,
    "planned_quantity": 0,
    "service_type": {
        "id": "string",
        "name": "string"
    }
}