{
  "manageEntity": {
    "action": "Save",
    "entityId": "474429",
    "entityType": "Track",
    "nonce": "0xffe62a677713bade8fd3539f68d784fbd2054e4079ac1b4e039e6d5fb4b7b8c7",
    "signature": "0x6e7964239ea244e4ed5fcc8175d9988376803a07d469e69d3362b75af911de4801c74ca2f7afb03ce7b6f94dd3ccad4889c1b650c7ebb3c710ef4c60f5a4f0ba1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}