{
  "manageEntity": {
    "action": "Save",
    "entityId": "1085992712",
    "entityType": "Track",
    "nonce": "0x500ee4437b7fe2a353611cdb50a96fc94d7857a8da52b2b6a1b4a5d6d1958560",
    "signature": "0x7e4e1c7793c0356dd8161986734369a1c9cf7782ba99f753373ff3f30f3cb5307a336f0dca26fdf06e280eaaa2bbda730df1a60f3ab8d39051e506ecefd3dc671c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}