{
  "manageEntity": {
    "action": "Save",
    "entityId": "1529284558",
    "entityType": "Track",
    "nonce": "0x390499e692f896cef0856ecb91c9da30be74b1304db50f7a788172e508441638",
    "signature": "0xce5fe15911ccbb182542bc25d3858d73afded75ae070a642847e1c4ec3139813175d7ca373b96e815dc25ac1c234bae337ebb98c8eb27a2321af299f2b4719891b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}