{
  "manageEntity": {
    "action": "Save",
    "entityId": "855774875",
    "entityType": "Track",
    "nonce": "0x69f1f3a47907910f2519821105179177f40fbeb5b536776b638b5faa05d87319",
    "signature": "0x3d8af00b44b27ef4519209f21dc77fbecb688f0ca4985b9e9d84cf73a19ecc4c1df676b79d932d9740e157045ff8d65190e9f6caae7a1f58752ae6ec0b4fa2531b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}