diff --git a/protos/orchestrator_service.proto b/protos/orchestrator_service.proto
index 88928c3..6e41c58 100644
--- a/protos/orchestrator_service.proto
+++ b/protos/orchestrator_service.proto
@@ -343,6 +343,7 @@ message CreateInstanceRequest {
     google.protobuf.StringValue executionId = 7;
     map<string, string> tags = 8;
     TraceContext parentTraceContext = 9;
+    google.protobuf.Timestamp requestTime = 10;
 }
 
 message OrchestrationIdReusePolicy {
@@ -490,6 +491,8 @@ message SignalEntityRequest {
     google.protobuf.StringValue input = 3;
     string requestId = 4;
     google.protobuf.Timestamp scheduledTime = 5;
+    TraceContext parentTraceContext = 6;
+    google.protobuf.Timestamp requestTime = 7;
 }
 
 message SignalEntityResponse {
@@ -575,6 +578,7 @@ message OperationRequest {
     string operation = 1;
     string requestId = 2;
     google.protobuf.StringValue input = 3;
+    TraceContext traceContext = 4;
 }
 
 message OperationResult {
@@ -591,10 +595,14 @@ message OperationInfo {
 
 message OperationResultSuccess {
     google.protobuf.StringValue result = 1;
+    google.protobuf.Timestamp startTimeUtc = 2;
+    google.protobuf.Timestamp endTimeUtc = 3;
 }
 
 message OperationResultFailure {
     TaskFailureDetails failureDetails = 1;
+    google.protobuf.Timestamp startTimeUtc = 2;
+    google.protobuf.Timestamp endTimeUtc = 3;
 }
 
 message OperationAction {
@@ -610,6 +618,8 @@ message SendSignalAction {
     string name = 2;
     google.protobuf.StringValue input = 3;
     google.protobuf.Timestamp scheduledTime = 4;
+    google.protobuf.Timestamp requestTime = 5;
+    TraceContext parentTraceContext = 6;
 }
 
 message StartNewOrchestrationAction {
@@ -618,6 +628,8 @@ message StartNewOrchestrationAction {
     google.protobuf.StringValue version = 3;
     google.protobuf.StringValue input = 4;
     google.protobuf.Timestamp scheduledTime = 5;
+    google.protobuf.Timestamp requestTime = 6;
+    TraceContext parentTraceContext = 7;
 }
 
 message AbandonActivityTaskRequest {