{
  "manageEntity": {
    "action": "Save",
    "entityId": "228338",
    "entityType": "Track",
    "nonce": "0xfbdb1252ae5e4fecd97839c964f1388a9b2de1d42b17d496435c751fc485619c",
    "signature": "0xd96a3f439079692255b233b2fc36e3437b4bfd69f419c1730c7cad7a75af38432063f00c1f5f53468ebaf43753cce8add5e213958fcd32f30fbc74f3fb0541681b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}