{
  "manageEntity": {
    "action": "Save",
    "entityId": "541164",
    "entityType": "Track",
    "nonce": "0x49cd6eeef22b26feca4ae8ff94195e10e946aea5c7dba245a1921b4bd9e2dba0",
    "signature": "0x30c21acc5382ccbffac3d245bb3ab617dc7a0ee5f186d21e9fd822c992fcc967291d2946feefe3bf06dcd1ac58ff68ed9f9d4eed56f8194a23156758b14191191c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}