{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627392988",
    "entityType": "Track",
    "nonce": "0x6e80c74c78e8b9aa4d3fa1c5d22fb498575af3b21cbc3608a0b4f459c546c5b8",
    "signature": "0x90a82a60c62a3122bb219823226ed93fae7dc76e59adaf109f91beb8b016a2a97d35fe18f7c37e861026b50d5719d2f6a0909e7b513d3abd18585dd02092a1381c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}