{
  "manageEntity": {
    "action": "Save",
    "entityId": "1823173525",
    "entityType": "Track",
    "nonce": "0x60e4cd96bc017fedab0d1d089edfbea3d7e39a83ca7623d37ba0a7c1ec5717dd",
    "signature": "0x005e5e17ba4f1764d36f6c40038c57603e21b901ee2b0f1aef5e50ad114ec1c45768bc94166c827902629345322aa5e04e3076d84c4a5acf2f2dde024cf472e41b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}