curl --request POST \
  --url https://demo-api.mobula.io/api/2/perp/lighter/update-margin \
  --header 'Content-Type: application/json' \
  --data '
{
  "timestamp": 123,
  "signature": "<string>",
  "marketId": 123,
  "usdcAmount": 123,
  "increase": true
}
'

{
  "success": true,
  "data": null
}