{
  "manageEntity": {
    "action": "Save",
    "entityId": "766059",
    "entityType": "Track",
    "nonce": "0xbe4ed029527946d713926a52842f5d95c0d4d4cf4c8eb0f118b20fb0015abd0c",
    "signature": "0x3445e39a97da3990ed49c515032b23d0f3c7ca814ff89317506724df6e60d92a51382cfa2faeb4e8cef71361a8646e8f6aab93f8b031979e65a43d02c2862af61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}