diff --git a/openvidu-server/src/main/java/io/openvidu/server/core/Participant.java b/openvidu-server/src/main/java/io/openvidu/server/core/Participant.java
index 0da4aa25..0b1a5a56 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/core/Participant.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/core/Participant.java
@@ -271,7 +271,9 @@ public class Participant {
 
 	public JsonObject toJson() {
 		JsonObject json = new JsonObject();
-		json.addProperty("connectionId", this.participantPublicId);
+		json.addProperty("id", this.participantPublicId);
+		json.addProperty("object", "connection");
+		json.addProperty("connectionId", this.participantPublicId); // TODO: deprecated. Better use only "id"
 		json.addProperty("sessionId", this.sessionId);
 		json.addProperty("createdAt", this.createdAt);
 		json.addProperty("location", this.location != null ? this.location.toString() : "unknown");
diff --git a/openvidu-server/src/main/java/io/openvidu/server/core/Session.java b/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
index c521686e..1b6e88b5 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/core/Session.java
@@ -224,8 +224,9 @@ public class Session implements SessionInterface {
 
 	private JsonObject sharedJson(Function<KurentoParticipant, JsonObject> toJsonFunction) {
 		JsonObject json = new JsonObject();
-		json.addProperty("sessionId", this.sessionId);
-		json.addProperty("id", this.sessionId); // TODO: deprecated. Better use only "sessionId"
+		json.addProperty("id", this.sessionId);
+		json.addProperty("object", "session");
+		json.addProperty("sessionId", this.sessionId); // TODO: deprecated. Better use only "id"
 		json.addProperty("createdAt", this.startTime);
 		json.addProperty("mediaMode", this.sessionProperties.mediaMode().name());
 		json.addProperty("recordingMode", this.sessionProperties.recordingMode().name());
diff --git a/openvidu-server/src/main/java/io/openvidu/server/core/Token.java b/openvidu-server/src/main/java/io/openvidu/server/core/Token.java
index 5e707316..220d19f8 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/core/Token.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/core/Token.java
@@ -91,8 +91,9 @@ public class Token {
 
 	public JsonObject toJson() {
 		JsonObject json = new JsonObject();
-		json.addProperty("token", this.getToken());
 		json.addProperty("id", this.getToken());
+		json.addProperty("object", "token");
+		json.addProperty("token", this.getToken());
 		json.addProperty("connectionId", this.getConnectionId());
 		json.addProperty("session", this.sessionId);
 		json.addProperty("role", this.getRole().toString());
@@ -104,6 +105,25 @@ public class Token {
 		return json;
 	}
 
+	public JsonObject toJsonAsParticipant() {
+		JsonObject json = new JsonObject();
+		json.addProperty("id", this.getConnectionId());
+		json.addProperty("object", "connection");
+		json.addProperty("connectionId", this.getConnectionId()); // DEPRECATED: better use id
+		json.addProperty("sessionId", this.sessionId);
+		json.add("createdAt", null);
+		json.add("location", null);
+		json.add("platform", null);
+		json.addProperty("token", this.getToken());
+		json.addProperty("role", this.getRole().toString());
+		json.addProperty("serverData", this.getServerMetadata());
+		json.addProperty("record", this.record());
+		json.add("clientData", null);
+		json.add("publishers", null);
+		json.add("subscribers", null);
+		return json;
+	}
+
 	@Override
 	public String toString() {
 		if (this.role != null)
diff --git a/openvidu-server/src/main/java/io/openvidu/server/kurento/kms/Kms.java b/openvidu-server/src/main/java/io/openvidu/server/kurento/kms/Kms.java
index 72b3cca4..31d74da9 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/kurento/kms/Kms.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/kurento/kms/Kms.java
@@ -152,9 +152,9 @@ public class Kms {
 	public JsonObject toJson() {
 		JsonObject json = new JsonObject();
 		json.addProperty("id", this.id);
+		json.addProperty("object", "mediaNode");
 		json.addProperty("ip", this.ip);
 		json.addProperty("uri", this.uri);
-
 		final boolean connected = this.isKurentoClientConnected();
 		json.addProperty("connected", connected);
 		json.addProperty("connectionTime", this.getTimeOfKurentoClientConnection());
diff --git a/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java b/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
index bcaf216a..326f468a 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
@@ -191,6 +191,7 @@ public class Recording {
 	public JsonObject toJson() {
 		JsonObject json = new JsonObject();
 		json.addProperty("id", this.id);
+		json.addProperty("object", "recording");
 		json.addProperty("name", this.recordingProperties.name());
 		json.addProperty("outputMode", this.getOutputMode().name());
 		if (RecordingUtils.IS_COMPOSED(this.recordingProperties.outputMode()) && this.hasVideo) {