How to pass null value from an Item update through REST api PATCH method

Summary:

I have created an Input Item and can able to update oracle application DFF column using REST api PATCH method. In this process, we need to delete the existing value from the DFF column. How can we achieve this.

REST API tested in postman with the below payload:

1) Working payload used for update

{

"product": "Test AK",

"change": "Test AK 100"

}

2) Working payload used for update with null values

{

"product": "Test AK",

"change": null

}

How can we achieve the same through Visual builder? I am able to update the columns similar to scenario 1. Need help with the scenario 2.

Thanks for your help in advance.