{
  "manageEntity": {
    "action": "Save",
    "entityId": "1976281973",
    "entityType": "Track",
    "nonce": "0x0c95ea8202b5cb13eda5b80c203d5351a9662c00b8db0bf027519b3e8a8cca6c",
    "signature": "0x88aeb982d5658c52ab65dd110be8c29be2fa084beab5b2f90f5b86eda88f8a410fe27f606a21453aa79ddbf1f7d73f4aae77726dbe41a245dbbfed37ecfd0bf01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}