{
  "manageEntity": {
    "action": "Save",
    "entityId": "407684",
    "entityType": "Track",
    "nonce": "0x1288c844e1af9b2fda55738eb95ca67585c951ebf0c098d5a1939cdd8efd06f8",
    "signature": "0x64040387526d180de9e0bbf43980113856f401eceb851680150eb05195afbf03547e9cbeac5f72116de2bf852a06955170ec65945891b8d14ded3ab825ac744c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}