{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304782109",
    "entityType": "Track",
    "nonce": "0x3d3a317742f798c81873c40c08f74fb573a46bfffc9baa24289c64098f682b94",
    "signature": "0x5491f9a3c960984263d6b20d5dc06ed16324aa118793db3fcd6196059c53efa10874e511ef014cb765723d15661a03463a4f84e35b47312dedb8f98dd150397d1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}