{
  "manageEntity": {
    "action": "Save",
    "entityId": "128393328",
    "entityType": "Track",
    "nonce": "0x438eb730d84e735e4602a4fc8bba4a59836e5145e2298229d952cab633786ff7",
    "signature": "0xcd783654e94c4f43c6855ab70c0074fce945afa03e51deaf0cdccd5647613edc2417fd238ad38f983b1223dad7d2150204a7edef25148964037267c6a5f0e6831b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}