{
  "manageEntity": {
    "action": "Save",
    "entityId": "986247018",
    "entityType": "Track",
    "nonce": "0xb00ed487d916a98f065c7bf29d0758892a21f8463bfe9b30b587526fc002f780",
    "signature": "0xda86371a58f91f4fa4d0515760be25b9623c0cc7dbe2456c85adf15365e11d2c283e15dd0bf770c92ebe410bded4fa45627b900eed13b82af3c16b0c291d14591c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}