{
  "manageEntity": {
    "action": "Save",
    "entityId": "353131542",
    "entityType": "Track",
    "nonce": "0x435ec2c4ee025f99d762c4e689753380ea292ba8e0e6e423fe378815f4ba7bba",
    "signature": "0x9c38b7edadf1e505963942cf78dbc6c7b00e5b6d2a727b76614c999148720e0429308c66f47409f646339ca01ce8dfc400adad4c4e62b671228fb66e90cc80451b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}