public function execute()
    {
        try {
            $nofitication = new \UOL\PagSeguro\Model\NotificationMethod(
                $this->_objectManager->create('\Magento\Framework\App\Config\ScopeConfigInterface'),
                $this->_objectManager->create('\Magento\Sales\Api\OrderRepositoryInterface'),
                $this->_objectManager->create('\Magento\Sales\Api\Data\OrderStatusHistoryInterface'),
                $this->_objectManager->create('Magento\Framework\Module\ModuleList'),
                $this->_objectManager->create('\Magento\Framework\Model\ResourceModel\Db\Context')
            );
            $nofitication->init();
        } catch (\Exception $ex) {
            //log already written in your pagseguro log file if pagseguro log is enabled in admin
            exit;
        }
    }