Billing

{
    "address": {
        "line1": "123 Main Street",
        "line2": "Apartment 4B",
        "city": "New York",
        "state": "NY",
        "postcode": "10001",
        "country": "US"
    },
    "date_of_birth": "string",
    "first_name": "string",
    "last_name": "string",
    "email": "string",
    "phone": "string"
}