{
  "manageEntity": {
    "action": "Save",
    "entityId": "72341",
    "entityType": "Track",
    "nonce": "0x6aea7a6a82b4bb3222ca54d816b75058ab36445aee9708359acdd0e28f43e6f3",
    "signature": "0x60c8013bf2ba848d6aa9318144f184bf21502e56c1809a5ea652ceb96a7c61721a4a90b82c723f2cf32607ddd409700db44f50a17e6ec09129c85182a5b432fb1c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}