{
  "manageEntity": {
    "action": "Save",
    "entityId": "1158844417",
    "entityType": "Track",
    "nonce": "0x775cf53fb76f2f1ba8a6b84d215a402a5328cce62633b77c29f5e0102ed8f5e5",
    "signature": "0x0c4220ffcbc6582b9cdd8a5a26a81e94258a13f4326b70e76816b0335cd3dd2e749b03a38605da29a3980588728bcc30f920882f2e455a9662b5c385d5cc28c31c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}