{
  "manageEntity": {
    "action": "Save",
    "entityId": "367166410",
    "entityType": "Track",
    "nonce": "0x9fdca01d731fb84944057aedb40bbbeff2a7b9a186dd2ee201bd932d2ccc51a3",
    "signature": "0x903f0c8c6a4b857501afa37f23f611b18b33cee140ed6da94c5af760ff8239316158cffc7ea2ed3cc88c47ace8e7e1fb4d9849d4566b07fc50f6db25dbf2448e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}