{
  "manageEntity": {
    "action": "Save",
    "entityId": "51649",
    "entityType": "Track",
    "nonce": "0x9dbdae8dd66f58249a19dbab93b0939256225b72f882766ee21a947c4b535588",
    "signature": "0x97eaf046e9db50bb8ffa5894a396bb717b090cd7dd1432000d10d10948054953104435cebfe8315177d74717a5a37d954f52454c4aea693e05f7b9b9036b21d21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}