SmartDocument::configureAddOperation

protected function configureAddOperation(Operation $operation): void
{
	parent::configureAddOperation($operation);

	$operation->addAction(
		Operation::ACTION_AFTER_SAVE,
		new class extends Operation\Action {
			public function process(Item $item): Result
			{
				$provider = new \Bitrix\Crm\Activity\Provider\SignDocument();

				$bindings = [[
					'OWNER_TYPE_ID' => $item->getEntityTypeId(),
					'OWNER_ID' => $item->getId(),
				]];
				
				$parent = $item->get('PARENT_ID_' . \CCrmOwnerType::Deal);
				if ($parent)
				{
					$bindings[] = [
							'OWNER_TYPE_ID' => \CCrmOwnerType::Deal,
							'OWNER_ID' => $parent,
						];
				}

				return $provider->createActivity(
					\Bitrix\Crm\Activity\Provider\SignDocument::PROVIDER_TYPE_ID_SIGN,
					[
						'BINDINGS' => $bindings,
						'ASSOCIATED_ENTITY_ID' => $item->getId(),
						'SUBJECT' => $item->getHeading(),
						'COMPLETED' => 'N',
						'RESPONSIBLE_ID' => $item->getAssignedById(),
						'START_TIME' => (new DateTime())
							->add('+30 DAYS'),
					]
				);
			}
		}
	);
}