{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649557791",
    "entityType": "Track",
    "nonce": "0xc9d2deb18ab19d2dd5522b36058178a7a144a5d0db69dd57ecf316298bb8ddeb",
    "signature": "0x152f6a6c9cb939aa97b896ed79ab967f925f6685e6924ecbac89a23708952c222376ed844a27be8b16ef62132179a3ba74f5f93ed7ce3644f22058b45165e7971b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}