diff --git a/proto/aquila/event.proto b/proto/aquila/event.proto
new file mode 100644
index 0000000..3c5ad60
--- /dev/null
+++ b/proto/aquila/event.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+option ruby_package = "Tucana::Aquila";
+
+package aquila;
+
+// Event that gets admitted by an action
+message Event {
+  // Id of Event type
+  int32 event_type = 1;
+  // Payload (JSON) of event params
+  string payload = 2;
+}
\ No newline at end of file