How to combine/merge data between several http get requests

Hi

I have three different HTTP GET Requests in my Scenario. I need to combine/merge data between these so I can get the final consolidated output in a JSON Structure:

  1. OrderDetails
  2. ItemDetails
  3. CustomerDetails

The OrderDetails contains a CustomerNumber and one or more ItemCodes. These fields is the key to use when merging data from ItemDetails and CustomerDetails.

Does anyone know the best approach here?