curl --request POST \
  --url https://transfer-sandbox.payven.com.tr/api/v1/transfers/bulk/reject \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transfers": [
    {
      "transfer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "rejection_reason": "<string>"
    }
  ]
}
'

{
  "message": "<string>",
  "is_success": true,
  "code": "<string>",
  "data": {
    "total_requested": 123,
    "successfully_rejected": 123,
    "failed": 123,
    "results": [
      {
        "transfer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "is_success": true,
        "message": "<string>"
      }
    ]
  }
}