{
  "manageEntity": {
    "action": "Save",
    "entityId": "1926930724",
    "entityType": "Track",
    "nonce": "0x4674567bb815a05b9e8c75988537ae53a57a75f3644b2089feb90a24bb0e0dae",
    "signature": "0xa57ef8372e104ab67b1d117041271fc6a3ce8a42caca4711ff9f94143b823d0047d8544bce102bcccf143e28196a26bd7e042db924e5c2405e15a430170718ec1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}