{
  "manageEntity": {
    "action": "Save",
    "entityId": "2127434622",
    "entityType": "Track",
    "nonce": "0x1dd5e1c32850383638e53f8983457769ee496135f475abc01e3253ed2377b4e3",
    "signature": "0x9e8dfaccd8581300fae8ba530f72a5a2b41c65c3bc03dd440b6b917da6cc744c034a8dbd9f4eaad99a1c482455e6f049b508de1505a5ede050a87530bf7b83561b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}