{
  "manageEntity": {
    "action": "Save",
    "entityId": "2147044797",
    "entityType": "Track",
    "nonce": "1787298048446583551",
    "signature": "0x03b0bb8f9ba076ec160ad14d14c2d7067f60a954633e9c83924bada0043805b62438d3c78aadb50a4bf27e15b3a10ea512bb7c69708233a3e736e32172ac091c1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}