diff --git a/lib/intercom/traits/api_resource.rb b/lib/intercom/traits/api_resource.rb
index 52707794..68675863 100644
--- a/lib/intercom/traits/api_resource.rb
+++ b/lib/intercom/traits/api_resource.rb
@@ -40,7 +40,9 @@ def to_hash
       def to_submittable_hash
         submittable_hash = {}
         to_hash.each do |attribute, value|
-          submittable_hash[attribute] = value if submittable_attribute?(attribute, value)
+          next unless submittable_attribute?(attribute, value)
+
+          submittable_hash[attribute] = value.respond_to?(:to_submittable_hash) ? value.to_submittable_hash : value
         end
         submittable_hash
       end
diff --git a/lib/intercom/traits/dirty_tracking.rb b/lib/intercom/traits/dirty_tracking.rb
index 0d120094..d155c2d9 100644
--- a/lib/intercom/traits/dirty_tracking.rb
+++ b/lib/intercom/traits/dirty_tracking.rb
@@ -22,7 +22,14 @@ def mark_field_as_changed!(field_name)
 
       def field_changed?(field_name)
         @changed_fields ||= Set.new
-        @changed_fields.include?(field_name.to_s)
+        field = instance_variable_get("@#{field_name}")
+        if field.respond_to?(:field_changed?)
+          field.to_hash.any? do |attribute, _|
+            field.field_changed?(attribute)
+          end
+        else
+          @changed_fields.include?(field_name.to_s)
+        end
       end
 
       def instance_variables_excluding_dirty_tracking_field
diff --git a/spec/unit/intercom/traits/api_resource_spec.rb b/spec/unit/intercom/traits/api_resource_spec.rb
index b5724556..aabb5d01 100644
--- a/spec/unit/intercom/traits/api_resource_spec.rb
+++ b/spec/unit/intercom/traits/api_resource_spec.rb
@@ -17,7 +17,15 @@
       'metadata' => {
         'type' => 'user',
         'color' => 'cyan'
-      } }
+      },
+      'nested_fields' => {
+        'type' => 'nested_fields_content',
+        'field_1' => {
+          'type' => 'field_content',
+          'name' => 'Nested Field'
+        }
+      }
+    }
   end
 
   let(:object_hash) do
@@ -35,6 +43,13 @@
       metadata: {
         type: 'user',
         color: 'cyan'
+      },
+      nested_fields: {
+        type: 'nested_fields_content',
+        field_1: {
+          type: 'field_content',
+          name: 'Nested Field'
+        }
       }
     }
   end
@@ -97,7 +112,7 @@
   it 'an initialized ApiResource is equal to one generated from a response' do
     class ConcreteApiResource; include Intercom::Traits::ApiResource; end
     initialized_api_resource = ConcreteApiResource.new(object_json)
-    except(object_json, 'type').keys.each do |attribute|
+    except(object_json, 'type', 'nested_fields').keys.each do |attribute|
       assert_equal initialized_api_resource.send(attribute), api_resource.send(attribute)
     end
   end
@@ -107,12 +122,28 @@ class ConcreteApiResource; include Intercom::Traits::ApiResource; end
 
     api_resource.from_hash(object_hash)
     initialized_api_resource = ConcreteApiResource.new(object_hash)
-
-    except(object_json, 'type').keys.each do |attribute|
+    except(object_json, 'type', 'nested_fields').keys.each do |attribute|
       assert_equal initialized_api_resource.send(attribute), api_resource.send(attribute)
     end
   end
 
+  it 'correctly generates submittable hash when no updates' do
+    assert_equal api_resource.to_submittable_hash, {}
+  end
+
+  it 'correctly generates submittable hash when there are updates' do
+    api_resource.name = 'SuperSuite updated'
+    api_resource.nested_fields.field_1.name = 'Updated Name'
+    assert_equal api_resource.to_submittable_hash, {
+      'name' => 'SuperSuite updated',
+      'nested_fields' => {
+        'field_1' => {
+            'name' => 'Updated Name'
+        }
+      }
+    }
+  end
+
   def except(h, *keys)
     keys.each { |key| h.delete(key) }
     h