{
  "manageEntity": {
    "action": "Save",
    "entityId": "1752846561",
    "entityType": "Track",
    "nonce": "0x789f94a502d2269a705e9e6afc3eab3890914b71513bd4df2ec82753bd2b3957",
    "signature": "0xefff14edcc4ed332791de349e50772108a691786133cbd04e115aeabde85423d3fd379f587e25654b7a4ccc7eaaa4efb8ed322c137e90bb8d48e6e79784fe4711b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}