{
  "manageEntity": {
    "action": "Save",
    "entityId": "349969375",
    "entityType": "Track",
    "nonce": "0xebd1398213f063ccb72f099dfb6117626fdad8a8bfd20a9913150c77f552b171",
    "signature": "0x45d46f7759418d9d4b3265d13bf4cd37e94094ca9e8180e35aff64cec5cad7ec76df3a2c539b6e9c0ec004a70baf331b08393e7a9e3ce8433c2bfdba999b3de81b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}