building payload on conditions

Summary:

I need to include/exclude a particular attribute in payload based on some condition

Content (please ensure you mask any confidential information):

HI,

I am reading a csv file from the SFTP server. One of of the field for ex tax_id could be null or not null. This tax_id I want to pass to a DFF segment in Fusion.

The DFF segment has LOV validation with SQL query. The LOV cannot have NULL value in it. So now, if the TAX_ID from file is null, then I do not want to include DFF segment in the payload. If I include it errors out saying NULL is not a value in payload.