curl --request GET \
  --url https://api.interchange.io/api/v2/buyer/planning-briefs/{briefId}/responses \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "<string>",
      "demandSignalId": "<string>",
      "demandSignalTargetId": "<string>",
      "sellerCustomerId": 0,
      "storefrontId": "<string>",
      "payload": {},
      "matchScore": 50,
      "actorUserId": 0,
      "createdAt": "<string>",
      "proposalCode": "<string>"
    }
  ],
  "total": 4503599627370495
}