{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000660961",
    "entityType": "Track",
    "nonce": "0x9c50c3aa8aba6318055dfe00f05f9910c2ba83c1c225f4c508c054ec6ada8ef2",
    "signature": "0x5f3b208b9d10884fb809fab821b66fc31f1ef8f12cdd99e123d6cf846c15b3aa14b166b1d53072f9ed0c6ff0a2d24dd53c3db7754c1ba9a5503e472ae7cdb8611c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}