curl --request POST \
  --url https://api.returnshelper.com/uat/user/api/Fba/FbaShipment/create \
  --header 'Content-Type: application/json' \
  --header 'x-rr-apikey: <api-key>' \
  --header 'x-rr-apitoken: <api-key>' \
  --data '
{
  "createFbaShipmentPayloadList": [
    {
      "trackingNumber": "<string>",
      "warehouseId": 123,
      "removalOrderId": "<string>"
    }
  ]
}
'