curl --request DELETE \
  --url https://api.example.com/v0/user/rules/{rule_external_id}

{
  "detail": "No wallet found with ID 12345 for this user.",
  "error_code": "WAL-404-001",
  "instance": "/v0/wallets/12345",
  "status": 404,
  "title": "Wallet Not Found",
  "trace_id": "abc123-def456-ghi789",
  "type": "https://api.sumvin.com/errors/wal-404-001"
}