{
  "manageEntity": {
    "action": "Save",
    "entityId": "926055",
    "entityType": "Track",
    "nonce": "0xb4d304733bb6b316a0d61c601932af18ba82bcd6307bae6b13dffe6aac14fd84",
    "signature": "0xd978119b34c21262f534c9527141089e489db984fcd38e68a323194f08a51887619fb5acc8c5c3795713f60d4536b032382e89ddda298446527b8a7c31590e791c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}