{
  "manageEntity": {
    "action": "Save",
    "entityId": "1451949594",
    "entityType": "Track",
    "nonce": "0x550faad0ffd3f4ae2f02a28662aff6ad9ebafeb8066f3a95454b46813690fa5a",
    "signature": "0xbd6cf6a64ef74780cd712b6be8f6f6e63b4217826041476aa17c434c5d6c02191c22584238a0300ff7035de93ea6274cd366b08cffa3f4e40a5a8a33d0393cb31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}