{
  "manageEntity": {
    "action": "Save",
    "entityId": "293123000",
    "entityType": "Track",
    "nonce": "0x797409a4ed1a176ef9d30b4d3f3149129c3a941d921502cf0a6a70507fb5fdb8",
    "signature": "0x60baac09999efd64864f68b12dce333ef7915dc408a536fd88f90aa386854be8077b7f7802d6ad23b3ae52000e4c762791d0e026370a4b1559fdf72c1f8c29281b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}