diff --git a/layouts/_default/single.activity.ajson b/layouts/_default/single.activity.ajson
index 983e5b0..b07147d 100644
--- a/layouts/_default/single.activity.ajson
+++ b/layouts/_default/single.activity.ajson
@@ -2,9 +2,17 @@
     "@context": [
         "https://www.w3.org/ns/activitystreams"
     ],
-    "title": {{ (htmlUnescape .Title | safeHTML) | jsonify }},
+    "to": ["https://www.w3.org/ns/activitystreams#Public"],
+    {{- if .Param "indieweb.reply.link" }}
+    "inReplyTo": "{{ .Param "indieweb.reply.link" }}",
+    {{ end -}}
+    {{- if .Title }}
+    "name": {{ (htmlUnescape .Title | safeHTML) | jsonify }},
+    "type": "Article",
+    {{- else -}}
+    "type": "Note",
+    {{ end -}}
     "content": {{ (htmlUnescape .Content | safeHTML) | jsonify }},
-    "summary": {{ (htmlUnescape .Summary | safeHTML) | jsonify }},
     {{- if .Params.images }}
     "attachment": [
         {{ $delimiter := "" -}}
@@ -28,7 +36,5 @@
     "updated": {{ dateFormat "2006-01-02T15:04:05-07:00" .Date | jsonify }},
     "id": "{{ .Permalink }}",
     "url": "{{ .Permalink }}",
-    "type": "Article",
-    "attributedTo": "{{ "" | absLangURL }}",
-    "to": ["https://www.w3.org/ns/activitystreams#Public"]
+    "attributedTo": "{{ "" | absLangURL }}"
 }
\ No newline at end of file