{
  "manageEntity": {
    "action": "Save",
    "entityId": "2054426077",
    "entityType": "Track",
    "nonce": "0x3a817b5c0dbe5c0b1837d7fdb2d35103a5249492fea471aba32765385493c56d",
    "signature": "0xa5c1bb9501a6b0f3def622390eb17b12748a5cd09b79c1c12d3df2083a104abc5638f96a99a34da02b0afaed81ee376514fc530413e15374adfa811166908d981b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}