{
  "manageEntity": {
    "action": "Save",
    "entityId": "1095929",
    "entityType": "Track",
    "nonce": "0x91b290e41c5948cbfb60e99cf109b84138d32dced86fbb74aed5cec4f4a50607",
    "signature": "0x5c4423e3ac5aa4d2cd36600775dc3e427f7a128fed32ce21c6b4f6dc5fc4df5f051ce98e979176539c318b6d1943fb576808ab70b220edb1033dc120669bad601c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}