{
  "manageEntity": {
    "action": "Save",
    "entityId": "368549",
    "entityType": "Track",
    "nonce": "0xc907c946e2bcf8649287a06a5af33a504320dcf2c51fa032de6a2f69ebaf6171",
    "signature": "0x3aa79e48a05936e1242bbc57fa05693cf49a2ebd196e55c28f67b75d6531b50863ebf0d5ad850191ce33a13316614eb72cadf4d94ced47ac6949a80c107a570c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}