{
  "manageEntity": {
    "action": "Save",
    "entityId": "157828472",
    "entityType": "Track",
    "nonce": "0xe9852f468f0e4deaf36c6215bbb6b83c63ce2e49c56e65fdf567fc6dd3f9abf7",
    "signature": "0x1e4411e98546d1a359ddf88016a98d7dafb6a1e8f192cfe89a930871109736cd33046a51f2dbdf637b7a3f8d5c059c47022381b3b1e078f9dbb442ac140b822f1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}