{
  "manageEntity": {
    "action": "Save",
    "entityId": "269674",
    "entityType": "Track",
    "nonce": "0xc4f65f9374a85554a29f064d91f395db3947c8de943be41e76cca4e84ca1ba63",
    "signature": "0x009be7bd3f8082a56ec959a9d1b85c630f77eaf3c081663e74de08bacf16bee91f740ea69ca39374f3fb5b6477481792250e666975ef04b996a8dab3c5337d611b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}