{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932248100",
    "entityType": "Track",
    "nonce": "0xe557bf19a88b729fe24a91d7fe02dfbcb0262e4a95d55161dbf843c1f62edc6b",
    "signature": "0x651e36d78eb91bb51ae17a588a9aab914bcfff4c73e0a80abdf9791bcd84d9317f5e5ae2fae71aa01fbe46ce1007cfdd06b3700fd94d93e657a0672b2dd19d521b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}