I have a nested content in one document type which I would like to fill from back end. I have a radio button list in the nested content. I managed to fill out the other text area properties except for the radio button list. I've read that I need to set the value of the nested property to the following json:

{
    "name" : "Some item name",
    "ncContentTypeAlias" : "yourDocTypeAlias",
    "propertyAlias1" : "some value 1",
    "propertyAlias2" : "some value 2"
}

Here's my code so far:

 var ncItems = new List<NestedItem>();             
                    foreach(var item in items)
                    {
                        var ncItem = new NestedItem();
                        ncItem.name = item.name;
                        ncItem.ncContentTypeAlias = "docTypeAlias";
                        ncItem.type = "radio-button-value"; // this is what it's not working
                        ncItem.placeName = item.name;                         
                        ncItem.distance = "0";

                        ncItems.Add(ncItem);
                    }

                    var ncItemString = Newtonsoft.Json.JsonConvert.SerializeObject(ncItems);

                    en.SetValue("nestedContentProperty", ncItemString);