{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041250305",
    "entityType": "Track",
    "nonce": "0x1dba133b86ef44164dbe9ca03441752403723333808c1a37222b37bc759f443a",
    "signature": "0x9128fa1e81156daded7854b3ae4e1e8234775cadeb31d5f403d571c40862f5570c63f34b004515fe70876d81e9e4c727169041dd8d3eaf1ca14cce8dc81973021c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}