{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468907050",
    "entityType": "Track",
    "nonce": "0xf04f172452201d125c1ee3cf12855512a206ddec4cf94b74538473449512b38f",
    "signature": "0xdbc29cb8c3f682ce2c1e72117e8412330da9700f71ab81e10d8dc972f87726337349175d3b9711423babe2f284d0f75a55583a7750899a192d65a81b3de2f9c81b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}