{
  "manageEntity": {
    "action": "Save",
    "entityId": "1373562858",
    "entityType": "Track",
    "nonce": "0x6be008fb3d89bad487e988000ed50e8b959242ade4f9eea7b7f5ee380f8e7589",
    "signature": "0x95701be5bb70f44ac936d185cd7d7ebdd8cb9464665da05e7ac63fdb40f80a977c368187fbe8e20b34b66662a7581cd29e93efb4e95b0e83916a3f566bf31bcf1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}