{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820851395",
    "entityType": "Track",
    "nonce": "0x25873704c92e48e63b8bbfb3debe5a4be60da8d4f7807514984e27e7f677ec86",
    "signature": "0x9d277a9b63d19881e6afedc7bfb3f1f3295a185b11f00c6e524542e71334af293349b3a88fb9acb23e1cb501e303fd3e98f631603210248e867884e07a37d3221b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}