{
  "manageEntity": {
    "action": "Save",
    "entityId": "411469",
    "entityType": "Track",
    "nonce": "0x93bf983c24c0a54c3dee112da975b7aa971c2247012becfb4945a6c5ca11f1aa",
    "signature": "0x6001d7e8e250a3f841c3bce78ea485f3a4f7a4470312c8a72136f55011f1a3224c695ff096f45399f018dc17b9a468015284054bc6856ae0c52100b19961b6c31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}