{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459019977",
    "entityType": "Track",
    "nonce": "0xfb0ea81cfcb5b5a6c17d95c84a7495b5536ac59e429335d4ee6e1a76a64ddf43",
    "signature": "0xe369c9a3cfeb8e32bfcc7418a976d1539b3fb72a43da919af33bcbbb5833d5b45b6f396606e7374077eabae77ba8ce1dbbf58b6de95f347b0e239675319740781c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}