{
  "manageEntity": {
    "action": "Save",
    "entityId": "51677802",
    "entityType": "Track",
    "nonce": "0x22c668dc682a777bb6b6e8598824f8b36e64e24fb24eb21224072b9ba20d4d2c",
    "signature": "0x08480c76999c589837d224036324a39db40562d2d831d47ca5ba8554d11691e20ad8aeebd6d162795701b3b287ab427376919992a894c04e170c79ded6992e771b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}