{
  "manageEntity": {
    "action": "Save",
    "entityId": "222447",
    "entityType": "Track",
    "nonce": "0x7d4c117707aa063f400508e28bd5523d8d6192eaba7f6c51fdd05377ae4ed4cd",
    "signature": "0x074ec2bfca686578e526719dc36716db49279d2a651498612827eb68315b6180215445ce7cbafad7c2113842f3b349568944530fa753d308f86bb39210f9bcd91c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}