{
  "manageEntity": {
    "action": "Save",
    "entityId": "872858713",
    "entityType": "Track",
    "nonce": "1792419466272365517",
    "signature": "0x04c9f1b4836df9633f4d22b6777fb7992270f169914ccbcc29e098e112d1716b06f6c3ef091755a60ba0744de22ccc904f5730a09c474b71da38cd886f64131f1c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}