{
  "manageEntity": {
    "action": "Save",
    "entityId": "536300025",
    "entityType": "Track",
    "nonce": "0x68449b7069a5b2b78eb0b31fa85aeefbebf9b83eb4452d2da9cd1df8021e73cc",
    "signature": "0x635993fa39ac9dbfe8fc45d9489d21f2b8ef4220e81e128c046a4df86725c05d048d0e260b8eb0d2782b6ea4e7ec0da1126313ba65c3191bb7df7148c5c59ee41b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}