docs(README): add manifest example

README.md

@@ -18,6 +18,47 @@ For a reference implementation of an external publisher, please refer to
 [PSConfluencePublisher](https://bitbucket.org/victorykit/psconfluencepublisher),
 a standalone PowerShell publisher for *Atlassian Confluence Builder for Sphinx*.
 
+The following is a sample manifest generated from the default sample:
+
+```
+{
+    "Pages": [
+        {
+            "Title": "Default Sample~",
+            "Ref": "pages/Default+Sample~.xml"
+        },
+        {
+            "Title": "Cats",
+            "Ref": "pages/Cats.xml",
+            "AncestorTitle": "Default Sample~"
+        }
+    ],
+    "Attachments": [
+        {
+            "Name": "pexels-just-a-couple-photos-3777622.jpg",
+            "ContainerPageTitle": "Cats",
+            "MimeType": "image/jpeg",
+            "Ref": "attachments/pexels-just-a-couple-photos-3777622.jpg"
+        },
+        {
+            "Name": "pexels-sami-aksu-14356302.jpg",
+            "ContainerPageTitle": "Cats",
+            "MimeType": "image/jpeg",
+            "Ref": "attachments/pexels-sami-aksu-14356302.jpg"
+        },
+        {
+            "Name": "objects.inv",
+            "ContainerPageTitle": "Default Sample~",
+            "MimeType": "application/octet-stream",
+            "Ref": "attachments/objects.inv"
+        }
+    ]
+}
+```
+
+> **NOTE**: The manifest's schema is currently part of the
+  [PSConfluencePublisher](https://bitbucket.org/victorykit/psconfluencepublisher)
+
 ## Installing
 
 You can install this extension via PyPI (through pip):