{
  "manageEntity": {
    "action": "Save",
    "entityId": "451997823",
    "entityType": "Track",
    "nonce": "0x8a061c36c1d79684a9e8ba5b55fc0c055222ec4248faead2633fb86225d04e7f",
    "signature": "0xe7c328217bbf72d380b36df70ae8f67634c797af4e506f37e44dac8f994d19654675560192d4dadfeedaed023d5e7430826a4c1cd623c46bfd481d2d496e76f01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}