curl --request GET \
  --url https://api.interchange.io/api/v2/buyer/campaigns/{campaignId}/creativeManifest \
  --header 'Authorization: Bearer <token>'

{
  "manifests": [
    {
      "creative_id": "<string>",
      "name": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z",
      "asset_count": 3,
      "campaign_id": "<string>",
      "format_id": {
        "id": "<string>",
        "agent_url": "<string>",
        "width": 123,
        "height": 123,
        "duration_ms": 123
      },
      "template_id": "<string>",
      "brand_domain": "<string>",
      "preview_url": "<string>",
      "requires_upgrade": true,
      "sync_status": {
        "synced": true,
        "agent_count": 0
      },
      "target_format_ids": [
        {
          "id": "<string>",
          "agent_url": "<string>",
          "width": 123,
          "height": 123,
          "duration_ms": 123
        }
      ]
    }
  ],
  "total": 4503599627370495
}