{
  "manageEntity": {
    "action": "Save",
    "entityId": "1561620222",
    "entityType": "Track",
    "nonce": "0xcb199516fcb4985d9d4961f75d6693975b53ffb74199374d23fde43e25b1646b",
    "signature": "0x91fba07bccc2a16743e6d7abdee06173f671f00b215603f540b259a3e125c1b449f5733758a425cabdffd884bc37948347fc8a66e3addeaa7cea9e613ad885091b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}