{
  "manageEntity": {
    "action": "Save",
    "entityId": "768758927",
    "entityType": "Track",
    "nonce": "0xed91f5257609e9b1561f15ae137dca71b025689463cd37d80caf78b36994b29e",
    "signature": "0x60a0e51cac933e451bb9c5ddbc216ddc4c8916192ac1f060bc333ac239e7209d7439bcd4aa2410cd8b817f54aaa885bc5591fed461d4788b8e6044ea02d3b0a81c",
    "signer": "0x556D15a5c7676f637104Fb4F811c98D46bad6AAF",
    "userId": "98088512"
  }
}