CreateSubscriptionRequest

{
    "customer_id": "string",
    "customer_email": "user@example.com",
    "customer_name": "string",
    "customer_phone": "string",
    "customer_address": "string",
    "currency": "GMD",
    "tax_rate": 0,
    "interval": "day",
    "interval_count": 1,
    "day_of_month": 1,
    "day_of_week": 0,
    "start_date": "2024-12-01",
    "end_date": "2025-12-31",
    "items": [
        {
            "product_id": "string",
            "description": "string",
            "unit_price": "string",
            "quantity": 1
        }
    ],
    "notes": "string",
    "metadata": {}
}