diff --git a/validation/users.json b/validation/users.json
new file mode 100644
index 0000000..6560dab
--- /dev/null
+++ b/validation/users.json
@@ -0,0 +1,24 @@
+{
+    "$jsonSchema": {
+        "required": [
+            "id",
+            "locale"
+        ],
+        "properties": {
+            "user": {
+                "bsonType": [
+                    "int",
+                    "long"
+                ],
+                "description": "Telegram ID of user"
+            },
+            "locale": {
+                "bsonType": [
+                    "string",
+                    "null"
+                ],
+                "description": "Preferred messages language according to "
+            }
+        }
+    }
+}
\ No newline at end of file