diff --git a/extensions/amp-analytics/0.1/test/vendor-requests.json b/extensions/amp-analytics/0.1/test/vendor-requests.json
index 990273740165..882baa56b33b 100644
--- a/extensions/amp-analytics/0.1/test/vendor-requests.json
+++ b/extensions/amp-analytics/0.1/test/vendor-requests.json
@@ -317,9 +317,9 @@
   },
   "parsely": {
     "host": "https://srv.pixel.parsely.com",
-    "basePrefix": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&title=_title_&date=_timestamp_&ampid=_client_id_",
-    "pageview": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&title=_title_&date=_timestamp_&ampid=_client_id_&action=pageview&metadata={\"canonical_url\":\"_canonical_url_\"}",
-    "heartbeat": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&title=_title_&date=_timestamp_&ampid=_client_id_&action=heartbeat&tt=_total_engaged_time_&inc=_incremental_engaged_time_"
+    "basePrefix": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&data=%7B%7D&title=_title_&date=_timestamp_&ampid=_client_id_",
+    "pageview": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&data=%7B%7D&title=_title_&date=_timestamp_&ampid=_client_id_&action=pageview&metadata={\"canonical_url\":\"_canonical_url_\"}",
+    "heartbeat": "https://srv.pixel.parsely.com/plogger/?rand=_timestamp_&idsite=!apikey&url=_ampdoc_url_&urlref=_document_referrer_&screen=_screen_width_x_screen_height_%7C_available_screen_width_x_available_screen_height_%7C_screen_color_depth_&data=%7B%7D&title=_title_&date=_timestamp_&ampid=_client_id_&action=heartbeat&tt=_total_engaged_time_&inc=_incremental_engaged_time_"
   },
   "permutive": {
     "track": "https://!namespace.amp.permutive.com/track?k=!key&i=_client_id_&it=amp&_ep_client.type=amp&_ep_client.title=_title_&_ep_client.domain=_canonical_host_&_ep_client.url=_canonical_url_&_ep_client.referrer=_document_referrer_&_ep_client.user_agent=_user_agent_",
diff --git a/extensions/amp-analytics/0.1/vendors/parsely.js b/extensions/amp-analytics/0.1/vendors/parsely.js
index ea2f4808e54c..9291dd8c0b17 100644
--- a/extensions/amp-analytics/0.1/vendors/parsely.js
+++ b/extensions/amp-analytics/0.1/vendors/parsely.js
@@ -17,6 +17,9 @@
 import {jsonLiteral} from '../../../../src/json';
 
 const PARSELY_CONFIG = jsonLiteral({
+  'vars': {
+    'data': '{}',
+  },
   'requests': {
     'host': 'https://srv.pixel.parsely.com',
     'basePrefix':
@@ -28,6 +31,7 @@ const PARSELY_CONFIG = jsonLiteral({
       'screen=${screenWidth}x${screenHeight}%7C' +
       '${availableScreenWidth}x${availableScreenHeight}%7C' +
       '${screenColorDepth}&' +
+      'data=${data}&' +
       'title=${title}&' +
       'date=${timestamp}&' +
       'ampid=${clientId(_parsely_visitor)}',