{
  "manageEntity": {
    "action": "Save",
    "entityId": "289438732",
    "entityType": "Track",
    "nonce": "0x6963b4e37deb3158f1d8df3452ecb924bf0448b69c3979b28360e06fcb91bda6",
    "signature": "0xbd457ad07b7e1c7593795a6c41fa639997c74a4c12e49bd66bb75a1ebe0cccab78f676bea2c4ae2e1eaf22d1dd93e4de2d0627eb1bff3b2ce6287cd09d9c876f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}