{
  "manageEntity": {
    "action": "Save",
    "entityId": "690943",
    "entityType": "Track",
    "nonce": "0xe78b826fc2f2835d7543a364ab9debf705b14bbd3551c3948be5e4c1628a724d",
    "signature": "0xa8f1550e085ce80ccf66a6a64b7884761f8ae0351fb4063b883922d7181dbdc3714bc1e94f74c10806215228a3da4177087c717260972e11990c6edbca210b7e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}