{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021211619",
    "entityType": "Track",
    "nonce": "0x1409039815ddb6f8701060707922477f96b671da15ede8f528620ab085c8d6a7",
    "signature": "0x5b574a436b4e91a17bb0174a2c3a411d13afb9e9927c7e4ddefef65e434c7f0521dc9eed051d050b5dd390052f8f9ca8d88f59e38ebe455af7ecdd15897436781b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}