{
  "manageEntity": {
    "action": "Save",
    "entityId": "966633629",
    "entityType": "Track",
    "nonce": "1790151539964349033",
    "signature": "0xd3fa5d0e8f19675260483f0c0ec3926c0ed272d73f40154dcc68dd5150ae72395ed22de742cd64796e97140eaa70f144c543973ef673d0b1a71de84d9a28dfdb1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}