Input Schema

{
    "type": "object",
    "required": [
        "cartId",
        "itemId",
        "quantity"
    ],
    "properties": {
        "cartId": {
            "type": "string",
            "description": "the base62 cart id"
        },
        "itemId": {
            "type": "integer",
            "description": "the line item id (numeric, e.g. 1, 2, 3)"
        },
        "quantity": {
            "type": "integer",
            "description": "the new quantity (0 removes the item)"
        }
    }
}