Client-side apps on the dashboard.
GET /api/v1/apps/{app_key}/settings
{
"_id": "5a2fafb31aaff82bc574b4ad",
"key": "{app_key}",
"property-1": "String data",
"property-2": "String data"
}
PUT /api/v1/apps/{app_key}/settings
{
"property-1": "String data",
"property-2": "String data"
}