{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606870236",
    "entityType": "Track",
    "nonce": "0xee9d6aa7f99a7c08c4aa787ff8eb56c12b64086d5bffc46ab5c6dec6b68a7d14",
    "signature": "0x3e313031191bebc6a20e7a496c8fe4dbd6abce70ce4d2001166dd576ea0a69965c0ce83d7d239c5b5d28b3bea0ba33619871d1fa7e7517da91d79bbe7ca2b4721c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}