I'm new with Datatable and I don't know how to solve this issue. I've been trying to load an array of objects but it doesn't work. I really appreciate if anybody could help me. Post my code below.

This is my source:
[
{
"contador": 1,
"serie":"3BKHKM9X59F373849",
"placas":"307EW9",
"tipounidad":"TORTON",
"socio":"TRANSPORTES CASTORES S.A. DE C.V. (ESCUELA)",
"noeconomico":"00064",
"marca":"KENWORTH",
"modelo":2009,
"estatus":1,
"km":0
},

{
    "contador": 2,
    "serie":"3BKHKM9XXJF313957",
    "placas":"93AD9M",
    "tipounidad":"TORTON",
    "socio":"TRANSPORTES CASTORES S.A. DE C.V. (ESCUELA)",
    "noeconomico":"00307",
    "marca":"KENWORTH",
    "modelo":2018,
    "estatus":1,
    "km":0
},

{
    "contador": 3,
    "serie":"3BKHKM9X1HF311718",
    "placas":"05ABB7L",
    "tipounidad":"TORTON",
    "socio":"TRANSPORTES CASTORES S.A. DE C.V. (ESCUELA)",
    "noeconomico":"00159",
    "marca":"KENWORTH",
    "modelo":2017,
    "estatus":1,"km":0
},

{
    "contador": 4,
    "serie":"3BKHKM9X0JF314275",
    "placas":"55AE4L",
    "tipounidad":"TORTON",
    "socio":"TRANSPORTES CASTORES S.A. DE C.V. (ESCUELA)",
    "noeconomico":"00309",
    "marca":"KENWORTH",
    "modelo":2018,"estatus":1,"km":0
}

]

Datatable code:

                $('#detalle-table').DataTable({
                    "ajax": {
                        url: "ajax/cargar_reportedetalle",
                        type: "POST",
                        dataType: 'json',
                        dataSrc: "",
                        columns: [
                            { data: "contador" }
                            { data: "noeconomico" },
                            { data: "marca" },
                            { data: "modelo" },
                            { data: "placas" },
                            { data: "tipounidad" },
                            { data: "socio" },
                            { data: "km" },
                            { data: "estatus" },
                            { data: "serie" }
                        ]
                    }
                });