curl --request POST \
  --url https://data-api-dev.voxfi.com.br/v1/trade/merge \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '
{
  "market_id": "<string>",
  "quantity": 123
}
'

{
  "message": "<string>",
  "success": true
}