{
  "manageEntity": {
    "action": "Save",
    "entityId": "335000164",
    "entityType": "Track",
    "nonce": "0xdaaa47b52da552a21d1fa6af5eb6bbb9393d231a7d109ea85a5d47e4355487b9",
    "signature": "0xa812a8d576505c3609b9d8ff04a110836f3948557c95942a22bf104235054ec30357ef1adbd23b39872e0fe990975fddce91524fe4f067d40e95ff2f33cbaa2d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}