{
  "event": "SocialStreamPostVariantCompleted",
  "channel": "private.SocialStream.social_stream", 
  "data": {
    "id": 789,
    "social_stream_post_id": 789,
    "variant_type": "ai_generated_style",
    "variant_data": {
      "style": "vintage",
      "filter": "sepia_tone",
      "processed_image": "http://localhost:3069/dev-assets/images/banner-placeholder.jpg",
      "processing_details": {
        "ai_model": "StyleTransfer-v2.1",
        "processing_time": 4.7,
        "quality_score": 0.89
      }
    },
    "status": "completed",
    "completed_at": "2024-01-15T10:37:30Z",
    "created_at": "2024-01-15T10:35:15Z",
    "updated_at": "2024-01-15T10:37:30Z"
  }
}