{
  "manageEntity": {
    "action": "Save",
    "entityId": "525993797",
    "entityType": "Track",
    "nonce": "0x4bf5cd8e41bfed518c00fe1efeb60ed98fc0f9c5ac01316c275d4a081d301cf5",
    "signature": "0x047baba8064610fa4ec7debde15ccdb309abcbd5f0bf2b187a04b8cfa72716c802eeefc21060a004b4ea75919bb63548572c8d0b771a08705a338e028b60f9261c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}