You say you are using jQuery but the signate for the success callback of an ajax operation is:

success(data, textStatus, jqXHR)

If you were returning a list of object the the data parameter would typically be an array assuming a json structure of something like:

[{id:1},{id:2},{id:3}]

You'd handle it like you would any other array, a for loop (or forEach or jQuery.each)

for(var i = 0; i<data.Length;i++){

var id = data[i].id;

//do something else

}

As I don't know how your html structure would function with your list of items i'm not sure how to advise specifically how to handle the array contents. Are you wanting to display a list of links?