This will be the name of your site for example
{ "Title":"metadata.json" }
This will be the text about your site for example
{ "Description":"a new way to share data about sites" }
This field should be the company or developer name example
{ "Author":"s0net" }
This is the icon of your page this should be a full url not like ./ , / , ../ it should be the full path like https://www.json.org/img/json160.gif note this can also be a svg file
{ "Icon":"https://www.json.org/img/json160.gif" }