Update sc task item variables using REST API

[RakshithS]

Hi,

Can any one  assist me to  update SC Task items variables using REST API?

I tried it using the Postman, on the sc_req_item table with this body:

========

{
"description": "RITM000111",
"variables.risk_assessment": "Yes",
"variables.risk_change1": "Yes",
"variables.additionnal_comments" : "testing",
"variables.source" : "test"
}

=======

i was able to update a field, but not the variables. How to update variables?

thank you!