Anyone know how to set a custom address on creating a sales order via REST?

it's been a while but I believe this should work for custom address

"shippingAddress": {

        "addressee": "WALMART",

        "addr1": "1490 Pine Tree Dr",

        "city": "Alamo",

        "state": "CA",

        "zip": "94507",

        "country": {"id": "US"}

    },