curl --request POST \
  --url https://{defaultHost}/v1/return_requests \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "return_request": {
    "order": "a2ed19cf-938c-4c23-a38d-ee465e69a6c3",
    "return_items": [
      {
        "line_item": "0c86afe9-49d4-4215-8629-21fc3939d8a5",
        "quantity": 1,
        "return_reason_id": "wrong_item"
      }
    ]
  }
}
'

{
  "id": "897b7467-a0f4-4b66-bfd6-f1102a2eb641",
  "object": "return_request",
  "number": "0000-R1",
  "status": "open",
  "order": "a2ed19cf-938c-4c23-a38d-ee465e69a6c3",
  "created_at": 1782209293,
  "updated_at": 1782209293
}