protected function initialize()
    {
        parent::initialize();

        $this->data = new stdClass();
        $this->data->ownId = null;
        $this->data->amount = new stdClass();
        $this->data->amount->currency = self::AMOUNT_CURRENCY;
        $this->data->amount->subtotals = new stdClass();
        $this->data->items = [];
        //$this->data->receivers = [];
    }