update.schema.json

{
    "type": "array",
    "items": {
        "type": "object",
        "properties": {
            "application_id": {
                "type": "integer"
            },
            "state": {
                "type": "string"
            },
            "details": {
                "type": "string"
            },
            "large_image": {
                "type": "object",
                "properties": {
                    "key": {
                        "type": "string"
                    },
                    "text": {
                        "type": "string"
                    }
                },
                "required": [
                    "key"
                ],
                "additionalProperties": false
            },
            "small_image": {
                "type": "object",
                "properties": {
                    "key": {
                        "type": "string"
                    },
                    "text": {
                        "type": "string"
                    }
                },
                "required": [
                    "key"
                ],
                "additionalProperties": false
            },
            "start_timestamp": {
                "type": "integer"
            },
            "end_timestamp": {
                "type": "integer"
            },
            "buttons": {
                "type": "array",
                "maxItems": 2,
                "items": {
                    "type": "object",
                    "properties": {
                        "label": {
                            "type": "string"
                        },
                        "url": {
                            "type": "string"
                        }
                    },
                    "required": [
                        "label",
                        "url"
                    ],
                    "additionalProperties": false
                }
            },
            "party": {
                "type": "array",
                "minItems": 2,
                "maxItems": 2,
                "items": {
                    "type": "integer"
                }
            }
        },
        "required": [
            "application_id"
        ],
        "additionalProperties": false
    }
}