{
  "manageEntity": {
    "action": "Save",
    "entityId": "406150",
    "entityType": "Track",
    "nonce": "0x2d8b3ceb39681bede9590ddfd8acc5b8471700ebafa9327997f96e845c8e1d61",
    "signature": "0x0d0fa32ed0a459b312cff188d553c8ec6b4abb8b1540c9f093de2189adcbd1a67bbca6511e582c34500ea89ec00aadec50aa2352aa46c1e12fab3fe6697bd2fd1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}