{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021902853",
    "entityType": "Track",
    "nonce": "0xeef982264e27e5d90f8a3675266703996d03733a23dc4d54fb9766d292288e5c",
    "signature": "0x113d26652af1d709ce50ad895f7a402f3540c5fe827d1d59d10c0525d90703207c68ed4812502938f6b5c458be85d497c88a9681bf93faa8064bffa57cf7cdcc1b",
    "signer": "0xa0C10F709D3c5b2b5FecDEA05B821Ac58bF0c782",
    "userId": "641492277"
  }
}