{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637336680",
    "entityType": "Track",
    "nonce": "0xed502cac4862d8840339a041936361c269a53c361fc7fb9b5f589ff20fb84872",
    "signature": "0x02cf3564bf97a37e496cbf4e822a77972d95c2b67b6812fdbd48b74557ce57e77e282a6a34fa4a0cf90317cb89a10ec97170b15a79bf5810c727d3131cf97b871c",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}