{
  "manageEntity": {
    "action": "Save",
    "entityId": "1434230655",
    "entityType": "Track",
    "nonce": "0x35a369dbe1218e57013cca566b240f7e757b89988255df3491fad67c7de0ad3a",
    "signature": "0xb0053e0283f41810246e097056587d61b49667672b8ed31d781f63108140815f31855836df255cac60ed30b4d2446904371d322c01e0b44bf76544fbdda4a7831b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}