curl -X PUT "https://app.talkover.ai/api/v1/campaigns/campaign-uuid/webhooks/webhook-uuid-1" \
  -H "Authorization: Bearer talq_your_environment_token_here" \
  -H "Content-Type: application/json" \
  -d '{
    "events": ["campaign.completed", "campaign_call.failed"],
    "include_call_events": true
  }'

{
  "success": true,
  "data": {
    "id": "webhook-uuid-1",
    "events": ["campaign.completed", "campaign_call.failed"],
    "include_call_events": true,
    "updated_at": "2024-01-15T15:30:00Z"
  }
}