curl --request PUT \
  --url https://api.example.com/venue-keys \
  --header 'Content-Type: application/json' \
  --data '
{
  "venue": "kalshi",
  "credentials": {
    "keyId": "<string>",
    "privateKey": "<string>"
  }
}
'

{
  "venue": "kalshi",
  "updatedAt": "<string>"
}