{
  "manageEntity": {
    "action": "Save",
    "entityId": "980138",
    "entityType": "Track",
    "nonce": "0x9495cde383a0e8133f865b0b9bbe4a9c907b00b9c8a4eb690bef23ab715de630",
    "signature": "0x30cfca693f7a57b2a064fb9f5ec930cc7ea444814d9c7175c276bef8ba89e1902eb7f6db0e079f5f1aa77b6175d54f43076e234e7fc35307cf993997b9f7772b1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}