{
  "req": "post",
  "op": {
    "type": "cancelOrdersCOID",
    "args": [
      "550e8400e29b41d4a716446655440000"
    ]
  },
  "sig": "0x1234567890...",
  "salt": 1234567890,
  "ts": 1767225600000,
  "exp": 1767225600000
}

{
  "id": 3,
  "data": [
    {
      "status": "ok",
      "oid": 1234567890,
      "coid": "550e8400e29b41d4a716446655440000"
    },
    {
      "status": "ok",
      "oid": 1234567891,
      "coid": "550e8400e29b41d4a716446655440001"
    }
  ]
}