{
  "manageEntity": {
    "action": "Save",
    "entityId": "320997315",
    "entityType": "Track",
    "nonce": "1793173070404982947",
    "signature": "0x8348dc5b691c1b896f60da860abe3d37a13bdb2435fd7b952334e7a85f8c9796057403d25f60a0a2144b65289889b3c6ba695321b677fb7e6983ff40ec8aa4471b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}