Rest service from po 7.31, with FormatConversionBean

Please help me with this issue

I need to consume a rest service,

Now i am working with module, that works fine

Then i Need to send some Headers to rest server,

Cache-Control: no-cache

Content-Type: application/json

App-Secret: 6694c25ade4cb0aaaaaa7c9c892195352354facd

I try with this module:

AddSOAPHeaderBean, but is not working

What is the better adapter type to achieve this rest cosumption: SOAP, or HTTP (axis)?

What kind of additional configuration do I need?

Thanks a lot for your help