PreSaleProductsModel

{
    "SteamId": "string",
    "PublishType": 1,
    "IsSecret": true,
    "Assets": [
        {
            "StockId": "string",
            "SellPrice": 0,
            "Description": "string",
            "AssetId": "string",
            "SteamGameId": "string"
        }
    ],
    "PartnerId": "string",
    "Timestamp": "string",
    "Sign": "string",
    "ServiceProviderId": "string",
    "OpenID": "string"
}