{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114346652",
    "entityType": "Track",
    "nonce": "0x9ca6884be3ca815dd0d3bd51bd5f3c7d0380674d42cd304238dcdfc443044805",
    "signature": "0x933a4cfe1fb95d4cf3c64fd3173645386118d94d9c1c25f6a87944eb037814317e6d6a6f76cd2b22b1334eaeef150b37062122e4c436d78928ba60e5b66eeeeb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}