hook_entity_operation(\Drupal\Core\Entity\EntityInterface $entity) Declares entity operations.

hook_entity_translation_insert(\Drupal\Core\Entity\EntityInterface $translation) Respond to creation of a new

hook_entity_base_field_info(\Drupal\Core\Entity\EntityTypeInterface $entity_type) Provides custom base field

hook_entity_extra_field_info_alter(&$info) Alter "pseudo-field" components on content entities.

hook_entity_prepare_form(\Drupal\Core\Entity\EntityInterface $entity, $operation, \Drupal\Core\Form\FormStateInterface $form_state)

hook_ENTITY_TYPE_field_values_init(\Drupal\Core\Entity\FieldableEntityInterface $entity) Acts when initializing

hook_entity_translation_create(\Drupal\Core\Entity\EntityInterface $translation) Acts when creating a new entity

hook_ENTITY_TYPE_prepare_form(\Drupal\Core\Entity\EntityInterface $entity, $operation, \Drupal\Core\Form\FormStateInterface $form_state)

hook_ENTITY_TYPE_presave(Drupal\Core\Entity\EntityInterface $entity) Act on a specific type of entity before

hook_entity_view_mode_info_alter(&$view_modes) Alter the view modes for entity types.