{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146190041",
    "entityType": "Track",
    "nonce": "0x78e97ba72eef8a2f7d8e0db2bf1409965f1fd8c86e623f6198c86aa96cf1711f",
    "signature": "0xc219887b173fd9ac41c6e3724d19da89588218a88bd8ee951e0efcc02cc3595367084005c818ca52b1e727f082bb896fd75544d1ab05576c1b2dd559a10eeb621c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}