Updating observable on webscoket event

Change-Id: I8325785b8d40b646ea67f28b61b8d603803a571e
diff --git a/src/app/interfaces/ws.interface.ts b/src/app/interfaces/ws.interface.ts
new file mode 100644
index 0000000..05de51b
--- /dev/null
+++ b/src/app/interfaces/ws.interface.ts
@@ -0,0 +1,8 @@
+export interface IWSEvent {
+ model: string;
+ msg: {
+   changed_fields: string[],
+   object?: any,
+   pk?: number
+ }
+}