diff --git a/predicthq/endpoints/schemas.py b/predicthq/endpoints/schemas.py
index 4e05a8a..6d27c3c 100644
--- a/predicthq/endpoints/schemas.py
+++ b/predicthq/endpoints/schemas.py
@@ -211,6 +211,14 @@ class Options:
     exclude = BooleanType()
 
 
+class Entity(Model):
+
+    class Options:
+        serialize_when_none = False
+
+    id = StringType()
+
+
 class LimitMixin(Model):
 
     limit = IntType(min_value=1)
diff --git a/predicthq/endpoints/v1/events/schemas.py b/predicthq/endpoints/v1/events/schemas.py
index ad315aa..5cc1ad1 100644
--- a/predicthq/endpoints/v1/events/schemas.py
+++ b/predicthq/endpoints/v1/events/schemas.py
@@ -5,7 +5,7 @@
     PaginatedMixin, SortableMixin, Model, ResultSet, ListType, StringType, GeoJSONPointType,
     StringListType, StringModelType, Area, ModelType, IntRange, IntType, DateTimeRange,
     DateTimeType, FloatType, ResultType, DictType, DateType, Place, Signal, DateAround,
-    LocationAround, BooleanType, BrandUnsafe
+    LocationAround, BooleanType, BrandUnsafe, Entity
 )
 
 
@@ -36,6 +36,7 @@ class Options:
     signal = ModelType(Signal)
     relevance = ListType(StringType)
     brand_unsafe = ModelType(BrandUnsafe)
+    entity = ModelType(Entity)
 
 
 class Entities(Model):