{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609414166",
    "entityType": "Track",
    "nonce": "0xf0314673fc5217c5cc2e2a3c0c637f4a8b696719c43495422a4952c94927289d",
    "signature": "0xacfe7bcfd57f0915c23fed4844c5d67dfd4b5f24ae9a3786a0e1e485dfd0d6b4448309ef8450ddb0a4d0d8d3baf461d50a8d20dd38eb132210dd45407774a8661b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}