I would like to add alt-text to the images in my Cascade Story Web Map to ensure Section 508 Compliance. Would it be possible to change the JSON for the Story Web map in ArcGIS Online Assistant to accomplish this? And if so what would the code look like? I saw on Esri Story Maps Developers' Corner where you can add image hyperlinks to Cascade by changing the JSON using ArcGIS Online Assistant. Any help would be greatly appreciated!