{
  "manageEntity": {
    "action": "Save",
    "entityId": "398135",
    "entityType": "Track",
    "nonce": "0xc83227fb451d9140e1c6002a210e18f9ccd36d5e8c503bc5e07061b9fff075ed",
    "signature": "0x0f11079a88b754085da44ffcf64fefbbb3a636d254b7f8604063692f83f6be341fc7f67df6bc1305e4017ab757e1ee45d77f43e23979584b90de968a95a7f7c31b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}