{
  "manageEntity": {
    "action": "Save",
    "entityId": "1168451634",
    "entityType": "Track",
    "nonce": "0x571e4b7f8e0dff5b550fe24c5bf848eef2086acdaaf07fb76e06553948605f77",
    "signature": "0xea128daab6c9fee18cde4681b0b810564a2b6a964eeab7d089cfbee0a45c5a7629d43c9b4e9f185b09005670688f8267b253827abe2fb74c9e26b263907771801c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}