curl --request POST \
  --url https://finsync.ar/api/accounts/{id}/manual-balance \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "balance": 123,
  "adjustment": 123
}
'

{
  "account_id": 123,
  "balance_before": 123,
  "balance_after": 123,
  "adjustment": 123
}