{
  "manageEntity": {
    "action": "Save",
    "entityId": "864406066",
    "entityType": "Track",
    "nonce": "0x4512d527d378a515e8147e30952a15c951942a23cfbce93eef53e07c2dcc3a5d",
    "signature": "0xd81c4191df2232c0349ef5067114fd259f1d4597378e4f272fb7af261e405f4076959504e887f8a95598973a6bedc43e7099d37f1c0d87af788ce696577483bb1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}