{
  "manageEntity": {
    "action": "Save",
    "entityId": "1359215613",
    "entityType": "Track",
    "nonce": "0x82ef188cb372cb26494ef8be8ca0ba08361e8a4db49838e74c792a3e05850449",
    "signature": "0xa584acaeab8b15c36a54a8efae8d77e1e2815ffab43048ff9afa3b3396cec95f4e36f6ba2b4255cc336456c29c52ff206a2f6819efe77c9637afc49e4c1e9db61c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}