{
  "manageEntity": {
    "action": "Save",
    "entityId": "2133946455",
    "entityType": "Track",
    "nonce": "0x6774e49d88695270ac385475aec1525adcb9c5066b4264ef5465928d460f2832",
    "signature": "0x6c38c617ab3cfbad15d696629404915513068d685a5b41546ee6f28bab22d97c2ce196f78b74330337c804a680f93a4549ad32df982ef6f39dd35b7d6ac7fd911b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}