{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "title": "UpdateShipmentStatus",
    "description": "Schema for updating a shipment's status",
    "properties": {
        "UpdateShipmentStatus": {
            "type": "object",
            "properties": {
                "shipmentId": {
                    "type": "string",
                    "description": "Unique identifier for the shipment"
                },
                "status": {
                    "type": "string",
                    "enum": ["pending", "shipped", "delivered", "returned"],
                    "description": "Current status of the shipment"
                },
                "updatedAt": {
                    "type": "string",
                    "format": "date-time",
                    "description": "Timestamp when the status was last updated"
                }
            },
            "required": ["shipmentId", "status"]
        }
    },
    "required": ["UpdateShipmentStatus"]
}