Pass data to ajax

I have an array of JSON strings and I want to pass it to ajax, but I do not know how to send it and how to receive it from the server side, any ideas?

$.ajax(
        {
            url: "WebS/webServices.aspx/funcion",
            type: 'POST',
            dataType: 'json',
            contentType: 'application/json; charset=utf-8',
            data: JSON.stringify(parametro),
            destroy: true,
            success: function (result) {
                resultado = result.d;
            }
        }).done(function () {});

Where parameter is the array of JSON strings (I have tried with JSON.stringify and without it) and I have tried to receive it as:

[WebMethod]
public static string funcion(string parametro)
{
}

But I receive as an error:

"El tipo System.String no se admite para la deserialización de una matriz."

Any idea how I can send it?