{
  "manageEntity": {
    "action": "Save",
    "entityId": "698122745",
    "entityType": "Track",
    "nonce": "0xc843ec31976949bf980f48f96115bba41b1e226b302c10b3600a063146d42120",
    "signature": "0x23c9bae86fd1430f4a8c70bc1b44ef334c48ae5e38ef6277f8663b7ebae1214b718dee07b8ab8605eb85b09126defe140b6814bb93feed9b00cf8d9fc353cdeb1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}