Editor fields data problem

Hello,

I'm facing a small problem with the fields object when initializing the editor.

 dataEditor = new editor({
        ajax:   "/endpoint",
        table: '#' + targetDiv + "-table",
        idSrc: "0",
        fields
    });

Atm fields are like this:

name: 0,
type:text

name: 1,
type:text

name: 2,
type:text

This is due to the fact that I initialize the table this way:

 let options = {
        buttons: parsedButtons,
        data: parsedRows,
        columns: [0:{"title" : "firstname"}, 1:{"title": "lastname"}  2:{"title": "description"}],
        .....
}

$('#' + targetDiv + "-table").removeAttr('width').DataTable(options);

I do this because my data has the following format:

{
  "title" : "DATATABLE",
  "filter" : true,
  "columns" : [ {
    "editable" : false,
    "type" : "text",
    "title" : "firstname",
  }, {
    "editable" : false,
    "type" : "text",
    "title" : "lastname",
  }, {
    "editable" : false,
    "type" : "text",
    "title" : "description",
  }],
  "rows" : [ {
    "row" : [ {
      "text" : "Allan",
      "color" : null,
      "backgroundColor" : "#FFF"
    }, {
      "text" : "Jardine",
      "color" : "#000",
      "backgroundColor" : "#FFF"
    }, {
      "text" : "Business Owner",
      "color" : "#000",
      "backgroundColor" : "#FFF"
    } ]
}

But what I want to do is use names instead of numbers for the fields.

name: firstname,
type:text

name: lastname,
type:text

name: description,
type:text

And if I do this, I get the following error:

Uncaught Unable to automatically determine field from source. Please specify the field name. For more information, please refer to https://datatables.net/tn/11

I have also tried to add name parameter to columns but with no success.

Is there any easy way to achieve this?

Thanks in advance!