[qwert_ukg]

var import_data = {
                        service_key: '...',
                        email_source: 'otherservice',
                        details: '...',
                        description: '...',
                        charset: 'utf-8'
                    }
                    
                    var url = '...';
                    $.ajax({
                        type: 'POST',
                        url: url,
                        dataType: 'jsonp',
                        jsonpCallback: "padding",
                        data : import_data,
                        success: function(json) {
                            console.log(json);
                        }
                    });

json:
padding({"data":data});