You can add,update and delete in SugarCRM using following actions.
CRUD Handling:
Save Action:
$bean = BeanFactory::newBean($module); //Create bean
$bean->name = 'Example Record'; //Populate bean fields
$bean->save(); //Save
$record_id = $bean->id; //Retrieve the bean id
Update Action:
$bean = BeanFactory::getBean($module, $id); //Retrieve bean
$bean->update_date_modified = false; //Set modified flag
$bean->name = 'Updated Name'; //Fields to update
$bean->save(); //Save
Delete Action:
$bean = BeanFactory::getBean($module, $id); //Retrieve bean
$bean->deleted = 1; //Set deleted to true
$bean->save(); //Save