{
  "manageEntity": {
    "action": "Save",
    "entityId": "1360505625",
    "entityType": "Track",
    "nonce": "0x72ca6516836105a67b5a1321488382bc480ad5feea5a851cb24b323222c1dad1",
    "signature": "0xe348172c50c5a6f075a6b74af2b209b51d2321f10089d59fc388d8d905ae20e165b6f3e94354b9eab7277d4e4ef17b52eaf3ad2b1bd97e9c7395211272e462091c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}