curl --request POST \
  --url https://app-api.walead.ai/api/v1/campaigns/{campaignId}/leads \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "leads": [
    {
      "publicIdentifier": "<string>",
      "linkedinUrl": "<string>",
      "firstName": "<string>",
      "lastName": "<string>",
      "name": "<string>",
      "email": "<string>",
      "phone": "<string>",
      "companyName": "<string>",
      "headline": "<string>",
      "website": "<string>",
      "summary": "<string>",
      "profilePictureUrl": "<string>",
      "customVariables": {}
    }
  ],
  "linkedinUrls": [
    "<string>"
  ],
  "checkDuplicatesAcrossWorkspace": true
}
'

{
  "success": true,
  "message": "<string>",
  "created": 123,
  "discarded": 123
}