{
  "manageEntity": {
    "action": "Save",
    "entityId": "470125018",
    "entityType": "Track",
    "nonce": "0xff80fa88247883d28165caae5b566648797450cab30699022da4e81ccf388a6b",
    "signature": "0xaf60ddec06951511cc024bb7a813d478abe134b801bc1654a3a07f0a04d2fb850e111917f3ce1affb10d9f9853a08f2dd299cc35d38355120d641ccf91a778751c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}