> 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-accounts/step-3-update-entity-through-api.md).

# Step 3: Update entity through API

Once the Entity and API are created, the API can be tested to update records in the Entity “UserName\_Acc\_customers.”

* To test the API, click on the \[Test] button.

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/testapi.png" alt=""><figcaption></figcaption></figure>

* The Test API box will display the “Entity actions” toggle button disabled.

{% hint style="info" %}
Note: If “Entity actions” is not enabled, testing an API using entity actions will result in the status of “failed” in the response.
{% endhint %}

* To allow the Entity to be updated or created with entity actions, click the “Entity actions” toggle button.

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/apitestenableentity.png" alt=""><figcaption></figcaption></figure>

* Select the default API gateway as “UserName\_Acc\_AddCustomer”.\
  If the user The default API gateway will be selected if the user does not select an API gateway

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/ch5ex1testapigateway.png" alt=""><figcaption></figcaption></figure>

* In the “Request” section, update the Json object as follows:\
  `{"Address":"Rose Street",`\
  `"City":"Kuala Lumpur",`\
  `"Customer_Value":5,`\
  `"Country":"Malaysia",`\
  `"Email":"JaneDoe@mail.com",`\
  `"First_Name":"Jane",`\
  `"IsActive":true,`\
  `"Join_Date":"2021-09-15",`\
  `"Last_Name":"Doe",`\
  `"Phone":"1237865",`\
  `"Rating":1000,`\
  `"Zip_Code":"45"}`

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/ch5ex1testrequest.png" alt=""><figcaption></figcaption></figure>

* To test if the record is created in the target entity, click the \[Test API] button.

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/ch5ex1testbutton.png" alt=""><figcaption></figcaption></figure>

* The Response section in the Test dialog displays a record creation success message.

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/ch5testsuccessbody.png" alt=""><figcaption></figcaption></figure>

* If the “Entity actions” field is disabled and the API is tested, the Body section in the Test dialog displays an error message when the \[Test API] button is clicked.
* In the list of Entities, click on “UserName\_Acc\_customers”. The created record will be displayed. Note that, as per requirements, the value in the “Customer\_Value” field is returned as “0” and the value in the “Rating” field is returned as “1” as defined in the “Actions”.

<figure><img src="https://media.langstack.com/documentation/media/images/code/training_manual/chapter_5/ch5apicreatedrec.png" alt=""><figcaption></figcaption></figure>