{
  "manageEntity": {
    "action": "Save",
    "entityId": "385105083",
    "entityType": "Track",
    "nonce": "0x44be4146e56cf44274b6872768de359a9615d599159c557566fb7a62a790bb2c",
    "signature": "0x665ed744ca6f50bca56b51a152b2f649521bd98381d695d98b5e5d3570eff348517b50e8044983d91e903cc17a813f0096abccdebdef3b9817b6d398109bd4821b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}