FitNesse. UserGuide. RestfulServices.
JsonProperties [add child]

{
"Edit": true,
"Properties": true,
"Prune": false,
"RecentChanges": true,
"Refactor": true,
"Search": true,
"Suite": false,
"Test": false,
"Versions": true,
"WhereUsed": true,
"secure-read": false,
"secure-test": false,
"secure-write": false
}