curl --request POST \
  --url http://localhost:8080/cabinet/admin/users/{user_id}/balance \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount_kopeks": 0,
  "description": "Admin balance adjustment",
  "create_transaction": true
}
'

{
  "success": true,
  "old_balance_kopeks": 123,
  "new_balance_kopeks": 123,
  "message": "<string>"
}