{
  "manageEntity": {
    "action": "Save",
    "entityId": "1167704803",
    "entityType": "Track",
    "nonce": "0x0b079e94d889ff57c5b2fd2decb70bf5847d5e2682fedce6d3c7ac25883fa2f3",
    "signature": "0x457c53677a3c5b6b4d930de01f6a875b8bd2e2ca259842dd760953d6b4c6610765fdc6ea1b90c98252d68ec519be9a526f62bbc0addd6fce9db74a9c014e35691b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}