{
  "manageEntity": {
    "action": "Save",
    "entityId": "250938",
    "entityType": "Track",
    "nonce": "0xe5ba6782b75bbe3e7fe1fa7a7ddf054e281d64c26c26c948a93b4d407982a362",
    "signature": "0x724d3e1b92dbe92d1997f6a41413d7baf77285d993bf39db2893100c69ea935d09056b7dfe367b7c4a13a9d5740756c13983b30b28b8222d96c587e8c402127b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}