// At the time of writing best bet is to do this:

// Construct a string from your response and separate the items with a comma
// Lets say your request sends response a string like this: '1,2'

$.ajax({
    url: '',
    //data: { "id": id },
    //async: false,
    success: function (data) {
        var response = data.split(",");
        var first = response[0];
          var second = response[1];
          // ... etc.
    }
}