{
  "manageEntity": {
    "action": "Save",
    "entityId": "1149277989",
    "entityType": "Track",
    "nonce": "1785973451393225305",
    "signature": "0x63dc99e2e7adc9d68e5b7f5c924dba1aeccf1fc53fa0ca444315c1cac86c22d23266197cb59b164f76739d12393f03a3c3eb0b98d24d78c53c2a9a55908e0aa11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}