curl --request GET \
  --url https://example.com/api/validator/v0/scan-proxy/transfer-preapprovals/by-party/{party}

{
  "transfer_preapproval": {
    "contract": {
      "template_id": "<string>",
      "contract_id": "<string>",
      "payload": {},
      "created_event_blob": "<string>",
      "created_at": "<string>"
    },
    "domain_id": "<string>"
  }
}