SubscriptionItem

{
    "metadata": {},
    "quantity": 0,
    "price_data": {
        "currency": "string",
        "product": "string",
        "unit_amount": 0,
        "recurring": {
            "interval": "day",
            "interval_count": 0,
            "unit_amount": 0,
            "total_billing_cycles": 0
        }
    }
}