Adds nullability description to Entities section (#227)

* Adds nullability description to Entities section * fix typo
2017-05-09 10:00:01 +02:00 · 2017-05-09 10:00:01 +02:00 · 08eb89f04b
parent fb31b2a7c5
commit 08eb89f04b
1 changed files with 2 additions and 0 deletions
--- a/Using-the-API/API.md
+++ b/Using-the-API/API.md
@ -543,6 +543,8 @@ ___

 ## Entities

+Note: Some attributes in the entity payload can have ``null`` value and are marked as _nullable_ on the tables below. Attributes that are not nullable are guaranteed to return a valid value.
+
 ### Account

 | Attribute                | Description                                                                        | Nullable |