{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029070650",
    "entityType": "Track",
    "nonce": "1785530574326294299",
    "signature": "0xc4db2d07c53362c2433543025297b6b1a38fdbba474ec143c8f1595f8014a8a35060599c9ac954ef1f41b4b8f1332f470f324d3223b179e71915186d619f741a1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}