{
  "manageEntity": {
    "action": "Save",
    "entityId": "485552492",
    "entityType": "Track",
    "nonce": "0x28553879d1bbbbc509d6f5d25941020cc6fe436481d077a11c2429ab741f39a6",
    "signature": "0x32587eea8fb58ffe3c23c495eda68731fe46a79e592632e9bdb1d36a8d033b677d881c5182de2e3b579033a74a8d34bfb187df96ddd451f92388855b04cee15d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}