curl --request POST \
  --url https://api.arbiterapi.com/v1/webhooks \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "url": "<string>",
  "event_type": "<string>",
  "market_id": "<string>",
  "platform": "<string>",
  "min_size": 123,
  "price_threshold": 123,
  "price_direction": "<string>"
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}