[
  {
    "allow_automatic_purchases": true,
    "allowed_merchant_category_codes": "5411,5812",
    "customer_id": "cust_123",
    "email": "user@example.com",
    "last4_digits": "1234",
    "merchant_link": "https://example.com/product/123",
    "mode": "live",
    "private_key_id": "key_789",
    "product_currency": "USD",
    "product_description": "Example Product",
    "product_price": 49.99,
    "spending_limit_amount": 100,
    "spending_limit_currency": "USD",
    "user_id": "user_456"
  }
]