'fb_sig_api_key' => [
                                '5987b7ccf4a68b6981b9465fe89cd5a63',
                                '5987b7ccf4a68b6981b9465fe89cd5a63'
                              ],
          'fb_sig_session_key' => [
                                    '7ab9597233493704f05192544-534105394',
                                    '7ab9597233493704f05192544-534105394'
                                  ],