{
  "version": "1.0",
  "sellers": [
    {"seller_id": "ssp-77", "name": "Example SSP", "domain": "ssp.example", "seller_type": "INTERMEDIARY"},
    {"seller_id": "pub-2001", "name": "Example Channel", "domain": "channel.example", "seller_type": "PUBLISHER"}
  ]
}