{
  "manageEntity": {
    "action": "Save",
    "entityId": "731331244",
    "entityType": "Track",
    "nonce": "0xb3805493dfe4c8fdfe2e4bed89ee9e85eb9e1c0c103524928c6441d725464559",
    "signature": "0x84959036c6a7bf1447c2773655127b61aef54f0de899ef20a5b6dd859eb3558b565d853ddedb152a66193e08695698be4ec82763f332e61a8c846e9c6c0eba8c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}