diff --git a/src/Conversations/Threads/Thread.php b/src/Conversations/Threads/Thread.php
index 15b19d6..8aafe6b 100644
--- a/src/Conversations/Threads/Thread.php
+++ b/src/Conversations/Threads/Thread.php
@@ -62,6 +62,11 @@ class Thread implements Extractable, Hydratable
      */
     private $assignedTo;
 
+    /**
+     * @var array|null
+     */
+    private $associatedEntities;
+
     /**
      * @var int|null
      */
@@ -116,6 +121,7 @@ public function hydrate(array $data, array $embedded = [])
         if (isset($data['action'])) {
             $this->actionType = $data['action']['type'] ?? null;
             $this->actionText = $data['action']['text'] ?? null;
+            $this->associatedEntities = $data['action']['associatedEntities'] ?? null;
         }
 
         if (isset($data['source']) && is_array($data['source'])) {
@@ -192,6 +198,14 @@ public function extract(): array
             ];
         }
 
+        if ($this->wasMerged()) {
+            $data['action'] = [
+                'type' => $this->getActionType(),
+                'text' => $this->getActionText(),
+                'associatedEntities' => $this->getAssociatedEntities(),
+            ];
+        }
+
         if ($this->wasCreatedByCustomer()) {
             $data['createdBy'] = [
                 'id' => $this->getCreatedByCustomer()->getId(),
@@ -265,6 +279,11 @@ public function wasCreatedByAction(): bool
         return \is_string($this->actionText);
     }
 
+    public function wasMerged(): bool
+    {
+        return $this->actionType === 'merged';
+    }
+
     public function getActionType(): ?string
     {
         return $this->actionType;
@@ -297,6 +316,11 @@ public function getAssignedTo(): ?array
         return $this->assignedTo;
     }
 
+    public function getAssociatedEntities(): ?array
+    {
+        return $this->associatedEntities;
+    }
+
     public function getTo(): ?array
     {
         return $this->to;
diff --git a/tests/Conversations/Threads/ThreadTest.php b/tests/Conversations/Threads/ThreadTest.php
index e69a790..5adf532 100644
--- a/tests/Conversations/Threads/ThreadTest.php
+++ b/tests/Conversations/Threads/ThreadTest.php
@@ -93,6 +93,28 @@ public function testHydrate()
         $this->assertTrue($thread->isImported());
     }
 
+    public function testHydrateAssociatedEntities()
+    {
+        $thread = new Thread();
+        $thread->hydrate([
+            'id' => 12,
+            'type' => 'lineitem',
+            'action' => [
+                'type' => 'merged',
+                'text' => 'You merged threads from another conversation',
+                'associatedEntities' => $associatedEntities = [
+                    'originalConversation' => '12345',
+                ],
+            ]
+        ]);
+
+        $this->assertSame(12, $thread->getId());
+        $this->assertSame('lineitem', $thread->getType());
+        $this->assertSame('merged', $thread->getActionType());
+        $this->assertSame('You merged threads from another conversation', $thread->getActionText());
+        $this->assertSame($associatedEntities, $thread->getAssociatedEntities());
+    }
+
     public function testHydrateTextFromBody()
     {
         $thread = new Thread();