diff --git a/pillarsdk/resource.py b/pillarsdk/resource.py
index 83d1ad2..39914c2 100644
--- a/pillarsdk/resource.py
+++ b/pillarsdk/resource.py
@@ -338,12 +338,8 @@ class Update(Resource):
         api = api or self.api
         attributes = attributes or self.to_dict()
         etag = attributes['_etag']
-        attributes.pop('_id')
-        attributes.pop('_etag')
-        attributes.pop('_created')
-        attributes.pop('_updated')
-        attributes.pop('_links', None)
-        attributes.pop('_deleted', None)
+
+        attributes = utils.remove_private_keys(attributes)
         attributes = utils.remove_none_attributes(attributes)
         url = utils.join_url(self.path, str(self['_id']))
         headers = utils.merge_dict(
@@ -369,12 +365,7 @@ class Replace(Resource):
         api = api or self.api
         attributes = attributes or self.to_dict()
         etag = attributes['_etag']
-        attributes.pop('_id')
-        attributes.pop('_etag')
-        attributes.pop('_created')
-        attributes.pop('_updated')
-        attributes.pop('_links', None)
-        attributes.pop('_deleted', None)
+        attributes = utils.remove_private_keys(attributes)
         if 'parent' in attributes:
             attributes.pop('parent')
         url = utils.join_url(self.path, str(self['_id']))