Create Order by API

Here is my updated payload with a change in cart and order_id:

{
    "billing_address": {
        "city": "austin",
        "country": "USA",
        "email": "mrgattispizza@delivers.com",
        "name": "joe schmo",
        "phone": "4592222",
        "state": "tx",
        "street1": "123 foo-bar ln",
        "zip": "78701"
    },
    "cart": <my-cart-id-integer-value>,
    "cart_order_id": "thats-some-funky-1234",
    "grand_total": 123.45,
    "lines": [
        {
            "cart_orderitem_id": "abc.123",
            "product": {
                "amazon_extra_info": {
                    "asin": "55555",
                    "listing_id": "12356",
                    "pending_quantity": 4
                },
                "cost": 1.69,
                "name": "special product name",
                "price": 69.69,
                "sku": "sku1",
                "taxable": "false",
                "weight": 1
            },
            "quantity": 2
        },
        {
            "cart_orderitem_id": "abc.456",
            "product": {
                "cost": 3.45,
                "name": "Plastic Toy",
                "price": 1.23,
                "sku": "sku2",
                "taxable": "false",
                "weight": 2
            },
            "quantity": 1
        }
    ],
    "order_date": "2015-12-09T12:01:00.855700",
    "order_id": "<myorder-id>",
    "product_amount": 100.1,
    "shipping_address": {
        "city": "austin",
        "country": "USA",
        "email": "jenny@igotyournumber.com",
        "name": "joe schmo",
        "phone": "8675309",
        "state": "tx",
        "street1": "123 foo-bar ln",
        "zip": "78701"
    },
    "tags": [
        {
            "color": "#FFFFFF",
            "text": "Unpaid"
        },
        {
            "color": "#C0C0C0",
            "text": "Alert"
        }
    ],
    "tax_amount": 1.23
}