{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947247655",
    "entityType": "Track",
    "nonce": "0xcb771bf4c6186aa31464ea478422826f7a3b89fadf993495ebc1abd6d75ae1d2",
    "signature": "0xd54b6bfdf9d94d1997978a829167df005b0a85b6a58444dfbfc1ebe59fe3ef787e4b544ceb23b60b7b94a8ae0374183a932bc18931c63086662869c08c8e36691c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}