{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602976213",
    "entityType": "Track",
    "nonce": "0xb5e06eb54c3fab869aaf05929327fcc5ad43183a67b5503f9beee69f304dd763",
    "signature": "0xa3b448dcb17090953f6fc87904cb4af168c82f09c019f2420fef39cdfd092e4803ced377f4c64698049612a75cd9d2978cc01670e1ba26264ce39388ba809ddc1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}