{
  "manageEntity": {
    "action": "Save",
    "entityId": "1395903772",
    "entityType": "Track",
    "nonce": "0xb62a723fec68bc1ad967d9cbb395c95e5115443757d062b498d88fcf86054211",
    "signature": "0x96dcede9d22fa88254670daa155b686760497c79d8233504bccb985592ef309b7f57aa7104fc34aa0ce9bb4665cb4a5454722e9e8e077413ab97baeae509eff41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}