{
  "manageEntity": {
    "action": "Save",
    "entityId": "36820598",
    "entityType": "Track",
    "nonce": "0x8cf71379cf0ff5d1108596241abbb20e5a344f37c6ce17636631c249f18ddf4f",
    "signature": "0xc0f5801606e99be0d9b4006f7ac46d79f009995c4dba065ff1dcc6bbd4eb915a694465068682ce610b25f3fb72b7a7ee3664df6dd950e9225d2cf1a3ab888d661c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}