{
  "manageEntity": {
    "action": "Save",
    "entityId": "368308",
    "entityType": "Track",
    "nonce": "0x212ee012ee351890c54abbc6fdb97f10eed6786398a3013d3955746ff3dc4fef",
    "signature": "0x9f6eeae8d918669d23abe96e741ec2f7727ae7344ce24bfeb3db01316db3669d2b30421b5666cb5d47499ca85a9612cfe04d1697b1f5b563fc96c08c84995ef61b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}