how to do variable nesting

[Mr-xn]

hi,guys
how to do variable nesting ? like this templates :
the below way of hex_decode variable nesting exp variable was wrong.

requests:
  - raw:
      - |
        POST {{path}} HTTP/1.1
        Host: {{Hostname}}
        Accept-Encoding: gzip, deflate
        content-type: application/x-www-form-urlencoded

        {{hex_decode({{exp}})}}

      - |
        GET /xxxxxx HTTP/1.1
        Host: {{Hostname}}

    payloads:
      path:
        - /aaaa
        - /cccc

      exp:
        - aaa
        - sss
        - xxx

how to nesting exp in hex_decode function ?

[ehsandeep]

@Mr-xn Here is valid syntax: {{hex_decode(exp)}}