{
  "manageEntity": {
    "action": "Save",
    "entityId": "455424278",
    "entityType": "Track",
    "nonce": "0x49125b2ed036654f9cf9858c2122b4983633cbcd1e8df93c14e28e207a7fd329",
    "signature": "0x910611249dba7f444b1f8c58dde139c7d76332d76ce152aa430d77017e3c8d517b7a851527432384ba2fbf58f5a6c622e63a584927de08b44f4c1413b3a1c3d41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}