{
  "manageEntity": {
    "action": "Save",
    "entityId": "905081682",
    "entityType": "Track",
    "nonce": "0x0df5d377057b7fe074916dde87fbc32a34f0c35a54e58bf111e165c399dedeb0",
    "signature": "0x165e0872b9d805f60e14f5281bd8783bf474ab4c2a60cf8dd0d6ed5c8bda588b694d0066c191861334ac351542c817bf914d25b7e5d3b4a532fded904e542d031c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}