{
  "manageEntity": {
    "action": "Save",
    "entityId": "424648332",
    "entityType": "Track",
    "nonce": "0x5347c59c3dae2b9d466d5f25d6ea77faf0d504e38981d82477aed5d2e0810d6f",
    "signature": "0xb3e2d145251412721d96be7f88027604d53b6ac33851447509542a9bedb53b82540d653f7ddfa6c2fb8e1f09ec65e9b6d7a02de100a2dda63927f3e06b6bf0f01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}