{
  "manageEntity": {
    "action": "Save",
    "entityId": "831154210",
    "entityType": "Track",
    "nonce": "0x0ce8b9e5d5804c4dd98dfd84078491fa12a87c9bc404a77913485b354c857496",
    "signature": "0x570f3f0178dec2f7d912730922aa96f3227e7836bfb7c52fdb1c3434af943944399560fca35ecf34841fc8ee37836552c83ef612f1f37e25fbdc6149e1b782d51c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}