{
  "manageEntity": {
    "action": "Save",
    "entityId": "28298021",
    "entityType": "Track",
    "nonce": "0xf5ad463ea87a2a914f8d3a990506b67c2d0287cdb016e520a2498c7ff472bd92",
    "signature": "0x6dceae1eb3994d9852515ea28e27c34714f6757ed1bd6d4eb502fa5952be2767701db2c37499f641a78c1cb08300cbe4282694284e049495c65800ff4ee8f3651c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}