curl --request POST \
  --url https://payments.oaknetwork.org/api/v1/merchant/webhooks \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "url": "https://example.com/webhooks/crowdsplit",
  "description": "Production webhook endpoint"
}
'

{
  "msg": "<string>",
  "data": {
    "secret": "<string>"
  }
}