Get Mailing Lists not return json data

Get Mailing Lists not return json data

https://campaigns.zoho.com/api/getmailinglists?authtoken=[API Authentication Token]&scope=CampaignsAPI&resfmt=JSON Not return data

https://campaigns.zoho.com/api/getmailinglists?authtoken=[API Authentication Token]&scope=CampaignsAPI&resfmt=XML return data

I can't find any issue please help