{
  "manageEntity": {
    "action": "Save",
    "entityId": "1484527353",
    "entityType": "Track",
    "nonce": "0xde5ffbda68647aede80d3c8a2c929a55693030d28ddf8d39f24b89f2ebe956a8",
    "signature": "0x99bb742fed762a4666920ea3d10222ad301dceabaaed8e7a36b2bf7fbc8b6f3d31a64b800ca4d6fec621400dc6dbd950a867db5dae518488a83cf47056a39f131c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}