{
  "manageEntity": {
    "action": "Save",
    "entityId": "412030665",
    "entityType": "Track",
    "nonce": "0x627c420225c865c20c62072cd666937970dc6256dce7b76b97b66a4fdde57ecd",
    "signature": "0x48be1432de99d221dbf9aa4ed0409e042b46f00b451bf43520081dfd26f239f50f31f148732095d86ecb5127b5ce77fe7f66797c4d923cafa3c8fdd5fb1ed7471b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}