curl --request PUT \
  --url http://localhost:3001/api/settings/email-providers \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "workspaceId": "<string>",
  "config": {
    "type": "MailChimp",
    "apiKey": "<string>",
    "webhookKey": "<string>"
  },
  "setDefault": true
}
'

"<string>"