Add create subnet operation
diff --git a/openstack/networking/v2/subnets/results.go b/openstack/networking/v2/subnets/results.go
index 1790028..3de2668 100644
--- a/openstack/networking/v2/subnets/results.go
+++ b/openstack/networking/v2/subnets/results.go
@@ -6,8 +6,8 @@
 )
 
 type AllocationPool struct {
-	Start string
-	End   string
+	Start string `json:"start"`
+	End   string `json:"end"`
 }
 
 type Subnet struct {