Перехват события обновления реквизитов

$eventManager = Main\EventManager::getInstance();

// requisite
$eventManager->addEventHandler('crm', 'OnAfterRequisiteAdd', array('Firstbit\Integration\Base\ExchangeCRM', 'RequisiteExchange'));
$eventManager->addEventHandler('crm', 'OnAfterRequisiteUpdate', array('Firstbit\Integration\Base\ExchangeCRM', 'RequisiteExchange'));

public function RequisiteExchange($fields){
    \CModule::IncludeModule('crm');
    $reqData = $fields->getParameters();
}