> For the complete documentation index, see [llms.txt](https://docs.langstack.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.langstack.com/welcome/get-started/learn-langstack/introduction-to-entities/exercise-1-customer-accounts-and-activities/customer-activities.md).

# Customer Activities

In this part of the exercise, store customer activity information. The customer ID will be read from the customer's account, and relevant activity will be stored in the customer's activity entity. The records will be stored through an API. <br>

{% hint style="info" %}
For this exercise, valid data must be in the customer's entity.
{% endhint %}

Follow the steps to

* Create an entity to store information related to customer activities and name it “UserName\_Acc\_Activities”.&#x20;
* Create an API to create and store records in that entity.&#x20;
* View customer activity records created through the API stored in the “UserName\_Acc\_Activities” entity against a customer ID.