{
  "manageEntity": {
    "action": "Save",
    "entityId": "1340079423",
    "entityType": "Track",
    "nonce": "0x05745c5143e42157708603f2bd7aed2fc70805b2e3000aa99528190458850598",
    "signature": "0xe4ed0d9c29d759c3ada50751d84d698f3a3b1fb262646c4389905340dff1070416fe3998cbf0fdf040028911c9abb1650884b308517e02e661b2a5ee3147d7ee1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}