{
    "message": "This is a message."
}

{}

{
    "type": "object", 
    "properties": {
        "message": {
            "type": "string", 
            "description": "The message to display."
        }
    }, 
    "required": [
        "message"
    ], 
    "additionalProperties": false
}

{
    "type": "object", 
    "required": [], 
    "properties": {}, 
    "additionalProperties": false
}

{
    "type": "object", 
    "properties": {}, 
    "additionalProperties": false
}