Parameter binding With Nested Objects in ASP.NET Web API

I have following model classes in my project:

public class RiskInfo
{
    /// <summary>
    /// Gets or sets the risk id.
    /// </summary>
    public string RiskId { get; set; }

    /// <summary>
    /// Gets or sets the risk address.
    /// </summary>
    public PropertyAddress RiskAddress { get; set; }
}

public class PropertyAddress
{
    /// <summary>
    /// Gets or sets the street number.
    /// </summary>
    public string StreetNumber { get; set; }

    /// <summary>
    /// Gets or sets the name of the street.
    /// </summary>
    public string StreetName { get; set; }

    /// <summary>
    /// Gets or sets the city.
    /// </summary>
    public string City { get; set; }

    /// <summary>
    /// Gets or sets the county.
    /// </summary>
    public string County { get; set; }

    /// <summary>
    /// Gets or sets the state.
    /// </summary>
    public string State { get; set; }
}

I have an action method in my controller that is defined like:

    [GET("hydrantflow/riskinfo")]
    public HttpResponseMessage GetFlowTestByRiskInfo([FromUri]RiskInfo riskInfo)

I am trying to call this action method from Fiddler by using this URL:

http://localhost:63932/hydrantflow/riskinfo?riskid=49WY99000191&streetnumber=900&streetname=pine%20st&city=pinedale&state=wy

but when I debug my action method, I see that only riskInfo.RiskId property is populated, riskInfo.RiskAddress stays null. However, if I change the above URL to

http://localhost:63932/hydrantflow/riskinfo?riskid=49WY99000191&riskaddress.streetnumber=900&streetname=pine%20st&city=pinedale&state=wy

I see that the riskInfo.RiskAddress.StreetNumber is now 900. It seems like I need prefix all the parameters in my URL with the property name "riskaddress" that doesn't seem like the best way to do this.

Is there a better to use parameter binding with nested objects?

Thanks