{
  "manageEntity": {
    "action": "Save",
    "entityId": "1091156637",
    "entityType": "Track",
    "nonce": "0xa4bdca01fb7b053c92146e71642fef5240f4ebf724b85ed9087b778764b30c7a",
    "signature": "0x587962cfdf1a5d1a563d4ea7d50525f8ce5d60e63167d65a8819c501c0e597463a9a7eecff2613190dd7a039986c6fd753b49d203534ed189090aeddc87a27741c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}