{
  "manageEntity": {
    "action": "Save",
    "entityId": "992862887",
    "entityType": "Track",
    "nonce": "0x01d8ca52c6c80a2c552cd5d2a45e01b3789d377d00a12891cc19878b2c863d55",
    "signature": "0xb3b60a56dd00528806381a2b0da8043001b40b6db8628508db4bdacc3448a6ec6d13114625df8bec52617c475166f888530957c2ea5577ac60d424e097fe4e1c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}