{
  "manageEntity": {
    "action": "Save",
    "entityId": "46619",
    "entityType": "Track",
    "nonce": "0x5a63c30e7abed1d811d7e2e09ea368bcdd6a652e38c09c2eed02a3040697266f",
    "signature": "0xeb6ab9ff7a190ac9877b8dc2d5c825f02c6479f63eb429ae1c319df957d171fd5e1cd3aa1b1f676c3a7d39f205ca7afbb93c99fadd61fe019d0c7040e50116651b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}