curl --request POST \
  --url https://api.example.com/v2/payments/bulk/approve \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transaction_ids": [
    "<string>"
  ]
}
'

{
  "results": [
    {
      "transaction_id": "<string>",
      "success": true,
      "error": "<string>",
      "validation_errors": [
        {
          "payment_id": "<string>",
          "error": "<string>"
        }
      ]
    }
  ]
}