{
  "manageEntity": {
    "action": "Save",
    "entityId": "659783910",
    "entityType": "Track",
    "nonce": "0x763a3283633cd1a619ffb710e5f7986c9d8883b387b97b95be78b8963dacf4ac",
    "signature": "0x8ac3b65309e5a44666ad0f1d7df9bc217ace2deff36c6aa0300d61aa538b8bde78dcf8e9c0e7bd3e3a3072364445e33033947e34a61ac19edaff29338934525f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}