{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497923784",
    "entityType": "Track",
    "nonce": "0x8388fde5dc72bc858f19905399b6d65174308576ee356a7482ccac7b0a159318",
    "signature": "0xd6bc008b5c4ccc32f14839f8b1b00d24c4e9d5cf8c0a48639fcff5d6dfb9e8e52a0088f93b10d185abc20364aff0e2908e8d6f9354b0d1f2e288f5548a34c8d41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}