{
  "manageEntity": {
    "action": "Save",
    "entityId": "1130030430",
    "entityType": "Track",
    "nonce": "0xbf6d3c2a70961cd37dff47d19d960afc77e4501663a8bc10f868558c03556813",
    "signature": "0xa9c7184dbf7cd1d4ff2977960184e9e59eb27cf406726dccfbfaa36f373a3fc45f923cfe4be6b4489740fae335dc54c8e71e059a048e93e8af047acb348b50001c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}