{
  "manageEntity": {
    "action": "Save",
    "entityId": "357603",
    "entityType": "Track",
    "nonce": "0x6160a18346e432b66fdac5b8ba07d69558f339aa602ad8a49a3c6adbf0ff01a2",
    "signature": "0x3fb9980639a83d5c24f31bafda76134c69c56e574b88a4a22e359c2e81ac751c7db64009feddd7bf583441bc47f956d959b5f626cc0b81d21c6fb46bd8fb98cd1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}