{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951993614",
    "entityType": "Track",
    "nonce": "0x642d1ecd4f0374ab9a261f3594d1b16822172e87776e0ade7f1bec055b63245a",
    "signature": "0x657ed679e0246cb28a94ee6c8008181931dda2212c75880e0a723ae119e6051f3be63d61a8b614aafdef4210603bfcc5cc11b7d4beafcf95504a3ea19474555d1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}