diff --git a/modules/opencase_defaults/opencase_defaults.module b/modules/opencase_defaults/opencase_defaults.module
index 8211001..a3af7a4 100644
--- a/modules/opencase_defaults/opencase_defaults.module
+++ b/modules/opencase_defaults/opencase_defaults.module
@@ -89,4 +89,46 @@ function opencase_defaults_block_access(\Drupal\block\Entity\Block $block, $oper
   return AccessResult::neutral();
 }
 
+function opencase_defaults_entity_base_field_info($entity_type) {
+  $fields = array();
+
+  // Add a Client field to cases
+  if ($entity_type->id() === 'oc_case') {
+    $fields['actors_involved'] = BaseFieldDefinition::create('entity_reference')
+      ->setLabel(t('Involved Parties'))
+      ->setDescription(t('People involved in this case. To add one, start typing their name.'))
+      ->setSetting('target_type', 'oc_actor')
+      ->setSetting('handler', 'default')
+      ->setTranslatable(TRUE)
+      ->setCardinality(-1)
+      ->setDisplayOptions('form', [
+        'label' => 'above',
+        'type' => 'entity_reference_autocomplete',
+        'weight' => -2,
+        'settings' => [
+          'match_operator' => 'CONTAINS',
+          'size' => '60',
+          'autocomplete_type' => 'tags',
+          'placeholder' => '',
+        ],
+      ])
+      ->setDisplayOptions('view', [
+        'label' => 'above',
+      ])
+      ->setDefaultValueCallback('opencase_defaults_actors_involved_callback')
+      ->setRequired(TRUE);
+
+  return $fields;
+}
+
+/**
+ * When creating a case, it sets the first involved party to the actor
+ * id from the URL, and the second to the author's linked actor 
+ * (if it exists and is different)
+ */
+function opencase_defaults_actors_involved_callback() {
+  $author_linked_actor_id = \Drupal\user\Entity\User::load(\Drupal::currentUser()->id())->get('field_linked_opencase_actor')->target_id;
+  $currently_viewed_actor_id = \Drupal::request()->query->get('actor_id');
+  return array_unique([$currently_viewed_actor_id, $author_linked_actor_id]);
+}
 
diff --git a/modules/opencase_entities/src/Entity/OCCase.php b/modules/opencase_entities/src/Entity/OCCase.php
index 496a7d1..ebd5ee7 100644
--- a/modules/opencase_entities/src/Entity/OCCase.php
+++ b/modules/opencase_entities/src/Entity/OCCase.php
@@ -74,17 +74,6 @@ class OCCase extends RevisionableContentEntityBase implements OCCaseInterface {
 
   use EntityChangedTrait;
 
-  /**
-   * When creating a case, it sets the first involved party to the actor
-   * id from the URL, and the second to the author's linked actor 
-   * (if it exists and is different)
-   */
-  public static function defaultVal() {
-    $author_linked_actor_id = \Drupal\user\Entity\User::load(\Drupal::currentUser()->id())->get('field_linked_opencase_actor')->target_id;
-    $currently_viewed_actor_id = \Drupal::request()->query->get('actor_id');
-    return array_unique([$currently_viewed_actor_id, $author_linked_actor_id]);
-  }
-
   /**
    * {@inheritdoc}
    */
@@ -250,29 +239,6 @@ class OCCase extends RevisionableContentEntityBase implements OCCaseInterface {
       ])
       ->setRequired(TRUE);
 
-    $fields['actors_involved'] = BaseFieldDefinition::create('entity_reference')
-      ->setLabel(t('Involved Parties'))
-      ->setDescription(t('People involved in this case. To add one, start typing their name.'))
-      ->setSetting('target_type', 'oc_actor')
-      ->setSetting('handler', 'default')
-      ->setTranslatable(TRUE)
-      ->setCardinality(-1)
-      ->setDisplayOptions('form', [
-        'label' => 'above',
-        'type' => 'entity_reference_autocomplete',
-        'weight' => -2,
-        'settings' => [
-          'match_operator' => 'CONTAINS',
-          'size' => '60',
-          'autocomplete_type' => 'tags',
-          'placeholder' => '',
-        ],
-      ])
-      ->setDisplayOptions('view', [
-        'label' => 'above',
-      ])
-      ->setDefaultValueCallback('Drupal\opencase_entities\Entity\OCCase::defaultVal')
-      ->setRequired(TRUE);
 
     $fields['files'] = BaseFieldDefinition::create('file')
       ->setLabel(t('Files'))