REST API invoke in OIC

Hi There,

I am creating REST service which will run EPM REST call and return one element from REST call response.

1) Service will get json load sample is in "sample_REST_invoke_load.txt.

2) Sample EPM REST call payload is

My first question is, how can I map values from REST call to EPM REST. I need to map ACT_YEAR, Fund, CostCode, Program, Project. Sample REST call is working version from postman with fix values.

3) REST call provide response

We need to use value in data element for next operations in OIC. Not sure how to access it. But my first problem is calling EPM REST call from OIC. I tried various options (including hardcoding, providing values using other options) but, REST call give error in OIC.