[
                'file_name' => '',
                'leads' => [
                    [
                        'contact' => '',
                        'first_name' => '',
                        'last_name' => '',
                        'zip' => '',
                        'city' => '',
                        'state' => '',
                        'email' => '',
                        'carrier' => '',
                        'gender' => '',
                        'ip' => '',
                    ]
                ],
                'append_carrier' => bool,
                'append_gender' => bool,
                'campaign' => CAMPAIGN_TOKEN,
                'country_code' => '' // like USA, UK, CA etc
            ]