{
    "id": "test-imp-id",
    "banner": {
        "format": [
            {
                "w": 300,
                "h": 250
            },
            {
                "w": 300,
                "h": 600
            }
        ]
    },
    "ext": {
        "prebid": {
            "bidder": {
                "pubmatic": {
                    "publisherId": "111111",
                    "adSlot": "test"
                }
            },
            "storedbidresponse": [
               { "bidder": "pubmatic", "id": "test-bid-id" }
            ]
        }
    }
}