{
  "manageEntity": {
    "action": "Save",
    "entityId": "185655658",
    "entityType": "Track",
    "nonce": "0xf324c9f883c17bc15564a989cac87678b17db4794f4e669ed392472006a830ea",
    "signature": "0x2b0e744a13948cd735127cec535f831f595988131e9bb9a6fadf89fdb32322841d003fef8a9b274dceae05500220356f312a63cef2d0dfd4b20490f5fcabd5c61b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}