{
  "manageEntity": {
    "action": "Save",
    "entityId": "68498",
    "entityType": "Track",
    "nonce": "0xf1592cfda09684d2625ae514356d00a6cfb43aa8d781527d2932bdc18a7c6a39",
    "signature": "0x675fab3341fa0a82a4b552cb506546ef70ac857b28400dbb5fe93b0d5bab913d6f812c6dbe33227b9d50893d1a364534867e0a87e24ad304ca8f391d1a3f1dbc1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}