Load content.json content before signing

src/Content/ContentManager.py

@@ -503,7 +503,16 @@ def sign(self, inner_path="content.json", privatekey=None, filewrite=True, updat
             content = None
         if not content:  # Content not exist yet, load default one
             self.log.info("File %s not exist yet, loading default values..." % inner_path)
-            content = {"files": {}, "signs": {}}  # Default content.json
+
+            if self.site.storage.isFile(inner_path):
+                content = self.site.storage.loadJson(inner_path)
+                if "files" not in content:
+                    content["files"] = {}
+                if "signs" not in content:
+                    content["signs"] = {}
+            else:
+                content = {"files": {}, "signs": {}}  # Default content.json
+
             if inner_path == "content.json":  # It's the root content.json, add some more fields
                 content["title"] = "%s - ZeroNet_" % self.site.address
                 content["description"] = ""