Support verify content.json directly from parsed dict

src/Content/ContentManager.py

@@ -616,6 +616,9 @@ class ContentManager(object):
         if inner_path.endswith("content.json"):  # content.json: Check using sign
             from Crypt import CryptBitcoin
             try:
+                if type(file) is dict:
+                    new_content = file
+                else:
                     new_content = json.load(file)
                 if inner_path in self.contents:
                     old_content = self.contents.get(inner_path)