Copy this code sample.
{
    "$id": "https://api.gsicommerce.com/schema/json/payment-authorization-request",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "additionalProperties": false,
    "type": "object",
    "properties": {
        "createTimestamp": {
            "type": "string",
            "format": "date-time"
        },
        "orderInformation":  {
            "$ref": "Common-Datatypes.json#/$defs/OrderInformation"
        },
        "paymentMethod": {
            "$ref": "Common-Datatypes.json#/$defs/PaymentMethod"
        },
        "amounts": {
            "$ref": "Common-Datatypes.json#/$defs/Amounts"
        },
        "billingInformation": {
            "$ref": "Common-Datatypes.json#/$defs/ContactDetails"
        },
        "shippingInformation": {
            "$ref": "Common-Datatypes.json#/$defs/ContactDetails"
        },
        "requestId": {
            "type": "string",
            "minLength": 3
        }
    },
    "required": [
        "createTimestamp",
        "orderInformation",
        "paymentMethod",
        "amounts",
        "billingInformation",
        "requestId"
    ]
}