{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030584",
    "entityType": "Track",
    "nonce": "0xa8529edf007c7b82d6f852bed48bf74dd9d36ea3736e7582bf8ac5b9ba95ff9d",
    "signature": "0x7f8817d10f01999f80eda850edd8948dce82d5c2c6a6d3fde1261cf3ab8863d815a8047aee80f83b8aabc252b5a88ff19affd2f15f7f3700945381ecde0082f21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}