{
  "manageEntity": {
    "action": "Save",
    "entityId": "599604",
    "entityType": "Track",
    "nonce": "0xc110a60a4e8ab35fe0698fdc592e8a1a7831eba320d978257e6d333ef31a5218",
    "signature": "0xb03b270f0f3db67c93fc2bf1d58b017cdd179d2321e1389a44d38fd2aeb93c713d2d2b55a168f449da239c1cf3de7332b1afcde28785b1e3269fe841010a1ccb1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}