{
  "manageEntity": {
    "action": "Save",
    "entityId": "387982882",
    "entityType": "Track",
    "nonce": "0xbd3d2007367cc3acfbb21072a293b64aec823296a3b52c3440aa8075a90ce5a3",
    "signature": "0xfb8a9b465e212dded22cbe65571b312534e6f964ba0cd679918607139621bcd46ccda14e626ec02f849604f2497febc70a2a1f2d9b993add69dbc341392d5b221b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}