{
  "manageEntity": {
    "action": "Save",
    "entityId": "1729493443",
    "entityType": "Track",
    "nonce": "0x1713e4afd12a041f863d90e6ae72e716464a14ee82f2ef4e7febb58632d323c9",
    "signature": "0xe12d083503fb6914d1aec5475bb691b0a17e2e8af3af410367b137cb5aa67e92628bedfe352864aea0c6efb551df600c7d99e018eb78f3be865d9b9fc967df041c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}