json_schema: {
      "properties": {
          "created": {
              "_$id": "/properties/created",
              "description": "creation date",
              "oneOf": [
                  {
                      "type": "null"
                  },
                  {
                      "_format": "date-time",
                      "type": "string"
                  }
              ],
              "readOnly": true,
              "title": "Created"
          },
          "description": {
              "_$id": "/properties/description",
              "description": "role description",
              "oneOf": [
                  {
                      "type": "null"
                  },
                  {
                      "contentMediaType": "text/html",
                      "type": "string"
                  }
              ],
              "title": "Description"
          },
          "modified": {
              "_$id": "/properties/modified",
              "description": "last modification date",
              "oneOf": [
                  {
                      "type": "null"
                  },
                  {
                      "_format": "date-time",
                      "type": "string"
                  }
              ],
              "readOnly": true,
              "title": "Modified"
          },
          "name": {
              "_$id": "/properties/name",
              "description": "role unique name",
              "maxLength": 32,
              "title": "Name",
              "type": "string"
          },
          "unchangeable": {
              "_$id": "/properties/unchangeable",
              "default": false,
              "description": "role data not modifiable (default:false)",
              "readOnly": true,
              "title": "Unchangeable",
              "type": "boolean"
          }
      },
      "required": [
          "name"
      ],
      "type": "object"
  }