{
  "manageEntity": {
    "action": "Save",
    "entityId": "2035402195",
    "entityType": "Track",
    "nonce": "1791469958721346595",
    "signature": "0x15344d12db9281c84f9d6cdff9c9967cea97bc9c6e7c4eff00dff7de65cf747a499e051e29d8052c15bafc961b498530185009d525ca054f355b44a2ffb33e2c1b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}