{
  "manageEntity": {
    "action": "Save",
    "entityId": "238914396",
    "entityType": "Track",
    "nonce": "0xb1845cf0cb78b84bb42a1927797fd3a84216db1a032fd84b10e53d069f9564e9",
    "signature": "0xae0fab701659c1e10efcc63250e14d55e4241aadfabb3d5af84eb7608677c73c4ccb364e5a99409caf064dccf8400452834f6f880a2379d6b7057f346cff84e81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}