{
 "charged": false,
 "detail": "amount is missing or not a non-negative integer of atomic units",
 "error": "bad_request",
 "http_status": 400,
 "note": "invalid subject is rejected before any RPC read, no charge, no envelope",
 "reason_codes": [
  "invalid_subject"
 ],
 "schema_version": "settle_v1"
}