Request: BasePrivateWsRequest<"edit_order", {
    deadline?: string;
    display_qty?: number;
    fee_preference?: "base" | "quote";
    limit_price?: number;
    no_mpp?: boolean;
    order_id: string;
    order_qty?: number;
    order_userref?: number;
    post_only?: boolean;
    reduce_only?: boolean;
    symbol: string;
    triggers?: {
        price: number;
        price_type?: "static" | "pct" | "quote";
        reference?: "index" | "last";
    };
}>

Reference: Edit Order