{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050436",
    "entityType": "Track",
    "nonce": "0x76a946bb6c0169cd6d9392839ebaa107521c8faef5b5321a81bec18b41ea26a4",
    "signature": "0x0338df2ef5d9d2917245917dae0248c73f5ea482c35849c16753ab26d46416e73d10fa4f4b40cc0240a4ab900f04ff3102ac92958b4ab2fa562a6c82eda2f0c91b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}