{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998182390",
    "entityType": "Track",
    "nonce": "0xc0c1b2edf29e183a95c01de1642d4a5dc13b54fc4a316afb311ac0e2e5e5393d",
    "signature": "0x4935933715b01b4fe427b1bb4eee27befd0cdbdf24a6345629f521b52ce43d524446920a61554adb2f505c6a9c0a053f5d57a51a62ce984192d02cbd33fc80551c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}