{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776104645",
    "entityType": "Track",
    "nonce": "0x9578ce0b7b322fa8aff5cb4f266b1d14fbda0f9faea81e3822da78de85d9c462",
    "signature": "0xb6dcb9ee72db24eddfdc2dbb716697e89bc0e2df5f778ed35245fe59e89371676dc7d3dc9dcea0d3ce9b9746543e4abdd3734942119a5c7baa36787cec02f8241b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}