{
  "manageEntity": {
    "action": "Save",
    "entityId": "159624",
    "entityType": "Track",
    "nonce": "0x497a7d74cef0dc573bf1f1d575b3f3d5d3ca1d8f3e0946623dacf3ae45cca6d1",
    "signature": "0x9ba9e84139a63582a5efd530f87979527c6db1f38a09b5053b25db0dcc12ab9629c957f33eb9f87d78283f0034441974ad2c358a9136ab429b538eba8c4894a61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}