{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264378631",
    "entityType": "Track",
    "nonce": "0xa6e6affa3e18e02e4dc910e822b431aeb1d611fc32d4ed9a2568ad8848098ab5",
    "signature": "0xbbc5191ee2bea259c1f864bbe618ab6d5f51832aa371214e5c31d51f72220a3c0254fdbcacaf6aef5a4ea6f665c9c050adc95eede355a3c39704655360a2b8581c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}