{
  "manageEntity": {
    "action": "Save",
    "entityId": "1320288966",
    "entityType": "Track",
    "nonce": "0x655bea0e33bd4c4662154f25eda4442abfbf7cd285ee6e5991b6f74d100fecac",
    "signature": "0x57e8024a081f71470f4ea88cd733dc06e0c1f7cb10192a7fa8accdd14bfa1d6f179b4c148ae96afc61ad2e2865bab6d4896a2075615e740c793a097ff41ac5b21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}