{
  "manageEntity": {
    "action": "Save",
    "entityId": "899789441",
    "entityType": "Track",
    "nonce": "0xf847b92914d7199425bb33e025dc76ec617e0ab811fb1eabf6e22109284aecae",
    "signature": "0xe2f09f2e0a2ee514bceb72601c7d2d406f13e94add2d905309503945e242335e564f2d3c7a186a99deab844720541b03857dae3f7d02b64b96d16107dec8e1a61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}