diff --git a/lib/ws.js b/lib/ws.js
index f8b401c..c38c031 100644
--- a/lib/ws.js
+++ b/lib/ws.js
@@ -30,7 +30,14 @@ export function init(cfg, db) {
             db.subscribe(
               message.subject,
               message.filter
-            ).then(r => ws.send(r));
+            ).then(r => ws.send(
+              JSON.stringify({
+                subject: message.subject,
+                field: message.field,
+                filter: message.filter,
+                value: r.map(v => v[message.field]),
+              })
+            ));
             break;
           default:
             throw 'invalid action "' + message.action + '"';