{
  "manageEntity": {
    "action": "Save",
    "entityId": "121335",
    "entityType": "Track",
    "nonce": "0x6d004a670161130b583a8aa3cbae90e41c6add972a8e1a9acfb1762f381d9fd5",
    "signature": "0xf2186fd0d18eefca7300d7e4a7db0aad44c79699e54c2771db13999e28128d2c6395b446ed4a991aa19d5371da3be58385f2d2cda59d333a08d7cba89f9bdabf1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}