{
  "manageEntity": {
    "action": "Save",
    "entityId": "1722774320",
    "entityType": "Track",
    "nonce": "0x49a149183aef219e810072d37fc5df7414174f962482324fdca47a662fe3b94c",
    "signature": "0xa714dbd8d45d5db55e087a51b6befef5ace48a25ce67d8df99b3552dfffc2ed73c1b3d63e8fdb07a229074a2d6344e678b0eaa5b84d579ef8395c99f605ce3731b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}