{
  "manageEntity": {
    "action": "Save",
    "entityId": "634992922",
    "entityType": "Track",
    "nonce": "0x0185c3253fbf05a00d862a1c830faab3bcb370d20a69bf97872ff125f389e759",
    "signature": "0xa0884b414408c43b236e40bc766cc32aa09965e1205a35b4a7cd1fc33856c8b41c70f557a3273eb3600d68535838e76aa815655238eebd3cd4a2821e1d01529e1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}