json deserialization to C# with dynamic keys [duplicate]

The response to my web request coming as the following (not under my control):

{
"nasdaq_imbalance": 
{
    "name": "nasdaq_imbalance", 
    "group": "Market Data", 
    "description": null
},
"DXOpen IM": 
{
    "name": "DXOpen IM", 
    "group": "Daily",
    "description": null
}, 
"Float Shares": 
{
    "name": "Float Shares", 
    "group": "Daily", 
    "description": null
}, 

}

Somehow, I need to deserialize that into C# object that contains a list of objects... Basically I need a list of objects like that:

public class Dataset    {
    public string name { get; set; } 
    public string group { get; set; } 
    public string description { get; set; } 
}

If you are using Json.NET, you can use JsonConvert.DeserializeObject<Dictionary<string, Dataset>>(json) and the keys of the dictionary will be nasdaq_imbalance, DXOpen IM, Float Shares