{
  "manageEntity": {
    "action": "Save",
    "entityId": "356644549",
    "entityType": "Track",
    "nonce": "0x9fe4defb6e9a6780feddd92bf86535424982cb690bbb6eccd04fe70c4c220d38",
    "signature": "0xf3e6fd39e01958ec1fd4ecfea6b94b7f2c7d9a7d10d396cb7ed6ba5575a345e92c3cbe6df7b16c0394c53ad2a9c29823d4eb5a0c15a2c76e8223ff63f86247971c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}