{
  "manageEntity": {
    "action": "Save",
    "entityId": "86989",
    "entityType": "Track",
    "nonce": "0xe6fae8af88dfbec9bc240da01987bd5fc66d1d6abe621696602d1bf15a988d8d",
    "signature": "0x1347f5c58fac3f66974109a4c6720424d7d0221b6d54abcaad60d5c6df8710a5296f75b0419d785c4a78bbaad36929eda3cfab58c13289cb12055bfa93f45ef01b",
    "signer": "0x4D11c3319e766BE8ad4bD57B7E1C96300e25bcd3",
    "userId": "261446337"
  }
}