{
  "manageEntity": {
    "action": "Save",
    "entityId": "250937",
    "entityType": "Track",
    "nonce": "0x0cbcf45e085c1b22aee519f179f2de76e8a587b097fe92fbed8faf7e78ffe263",
    "signature": "0x1602d9518ccc7664ab6fd09171cebb7652b54f0cf711b156012b7b74065f353537d823a3f13609e7f6b85900f6376ea0d47bccd5fdc24acfb895478d5483b1841b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}