[{
    "model": "core.shippingrate",
    "pk": 1,
    "fields": {
        "shipping_provider": "USPS",
        "name": "Variable",
        "container": "VARIABLE",
        "min_order_weight": null,
        "max_order_weight": null,
        "is_selectable": false
    }
}, {
    "model": "core.sitesettings",
    "pk": 1,
    "fields": {
        "usps_user_id": "012BETTE1249",
        "default_shipping_rate": 1
    }
}]