get_dashboard

{
  "id": 12,
  "name": "Weekly Performance",
  "layout": { "grid": [...] },
  "master_filters": [...],
  "reports": [
    { "id": 42, "name": "ROAS by Source", "report_type": "table", "metrics": ["roas"], "sources": ["facebook_ads", "google_ads"], "attribution_model": "last_touch", "group_by": ["sources"] }
  ]
}