{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962853338",
    "entityType": "Track",
    "nonce": "0x455fb1d77867bdebaba4d16b315a86b5fb4947cd43830c4f89c5e3ece93b603e",
    "signature": "0x1aeaa888136b0df077dc08c6c768967c2bf0172d7b8ce7c35f97aa115615b92f17d3b95159c8da6e5b926c7493af81051dd5ff86421767b008af88522609d72d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}