Getting the GUID of a Record Retrieved By Jscript/OData

I've created a function which returns the record in an entity where a field is equal to a certian value.

How can i now get the guid of this record.

function getCurrentLabourRate() {

    var serverUrl = Xrm.Page.context.getServerUrl();
	
    var oDataUrl = serverUrl + "/xrmservices/2011/OrganizationData.svc/c2_labourrateSet?$filter=c2_Status/Value eq 745670000"

    jQuery.ajax({
        type: "GET",
        contentType: "application/json; charset=utf-8",
        datatype: "json",
        url: oDataUrl,
        async: false,
        beforeSend: function (XMLHttpRequest) {
            XMLHttpRequest.setRequestHeader("Accept", "application/json");
        },
        success: function (data, textStatus, XmlHttpRequest) {
            if (data && data.d != null && data.d.results != null) {
				var labourRateCurrentRecord = data.d;

            }
        },
        error: function (XmlHttpRequest, textStatus, errorThrown) {
            alert("Error :  has occured during retrieval of the records ");
        }
    });
}

I believe below only selects the record of the entity c2_labourrate where the status of an option set is equal to the value 745670000 the name in the optionset of this value is current.

/xrmservices/2011/OrganizationData.svc/c2_labourrateSet?$filter=c2_Status/Value eq 745670000"