{
  "manageEntity": {
    "action": "Save",
    "entityId": "674101932",
    "entityType": "Track",
    "nonce": "0x89c6f310f244cd167f627cd820e4f93cc210d456576346ad947df5c92c9cd0fa",
    "signature": "0x066a7d45ff4e680a87b740140eb13167d72b690e44bc556248a78fc416df7c4f58b655eff64d0af3cd5f1245fe46a702bafeb3db3b090876b527b60a099df1401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}