{
  "manageEntity": {
    "action": "Save",
    "entityId": "726969",
    "entityType": "Track",
    "nonce": "0xcee8332f0512f2ff0cbaf0e17242a8aa7ddb8cfcab4b7751bdb6d0aa89bc538c",
    "signature": "0x0a16981737d4f8f12e91deedb0e21597ad134d7888fd4e74156d0a80c0e9627a3351eda91cbda5aaebb34df079405d62a80f82eb2c22f247e7c22c6690b20b081c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}