curl --request POST \
  --url https://api.getredo.com/v2.2/returns/{returnId}/process \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "products": [
    {
      "_id": "64e4d5e837572a4813b73e41",
      "processInput": {
        "newMerchantAdjustment": 123,
        "restock": true
      },
      "reject": false
    }
  ],
  "customerNotes": "<string>"
}
'

{
  "message": "<string>"
}