diff --git a/controller/event/event.go b/controller/event/event.go
index 1191b2f5ad90153303c4bcc4678119b1fa48357e..68e8fb1c525fbd6318b3a4af5cd4541fce0cad83 100644
--- a/controller/event/event.go
+++ b/controller/event/event.go
@@ -4,9 +4,9 @@ import "github.com/google/uuid"
 
 // Event is a event that can be published via the event service as payload.
 type Event struct {
-	ID       uuid.UUID
-	EntityID uuid.UUID
-	Type     string
+	ID       uuid.UUID `json:"id,omitempty"`
+	EntityID uuid.UUID `json:"entity_id,omitempty"`
+	Type     string    `json:"type,omitempty"`
 }
 
 // TypeAdd is an add event.