{
  "manageEntity": {
    "action": "Save",
    "entityId": "1993421751",
    "entityType": "Track",
    "nonce": "0x010441823fa95f0293d6cb6b6d886ed68902f58e4c4e4eb583a58e43957cf7a5",
    "signature": "0x30a4bb6a280e1462450cfd8e3440351fa6d9320d4dcbc4f91cbb844a2c32149374dc707ce6e487a7b1fb050a0c2c6d8488917ca2e2dbe3b9e0edfefbd9e737961c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}