curl --request POST \
  --url https://api.getredo.com/v2.2/stores/{storeId}/returns/bulk \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "returns": [
    {
      "products": [
        {
          "externalId": "<string>",
          "quantity": 2,
          "provider": "shopify",
          "sku": "<string>",
          "barcode": "<string>",
          "productTitle": "<string>",
          "variantTitle": "<string>",
          "reason": "<string>",
          "condition": "<string>"
        }
      ],
      "customer": {
        "firstName": "<string>",
        "lastName": "<string>",
        "email": "jsmith@example.com"
      },
      "externalReferenceId": "<string>",
      "trackingNumber": "<string>",
      "carrier": "<string>",
      "notes": "<string>",
      "idempotencyKey": "<string>",
      "currency": "<string>"
    }
  ]
}
'

{
  "totalCount": 123,
  "processedCount": 123,
  "errorCount": 123,
  "results": [
    {
      "status": "created",
      "index": 123,
      "returnId": "<string>"
    }
  ]
}