{
  "manageEntity": {
    "action": "Save",
    "entityId": "135433",
    "entityType": "Track",
    "nonce": "0x7117e7caad0ace5fe0cbeb4ed9ce1b6c997f26b99b88aecf3162a3f3265d5520",
    "signature": "0x4850c30a6389817ef1d69fdc5996fd6615bea1c3472ef178eb2fe8a70fafb5991044bd4f9a0e4680d254c9535c117388acc9ef72b9aa24f3636cd1128792714c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}