hyperion.ng/libsrc/jsonserver/schema/schema-clear.json

{
    "type":"object",
    "required":true,
    "properties":{
        "command": {
            "type" : "string",
            "required" : true,
            "enum" : ["clear"]
        },
        "priority": {
            "type": "integer",
            "required": true
        }
    },
    "additionalProperties": false
}