{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412589599",
    "entityType": "Track",
    "nonce": "0xedc6a1ff46aa8de10f024fa421dd8d195f4efbb674f6fcffccb1c35ba3547ffa",
    "signature": "0x5642a87e819f67bcf37a30ea8c20c19c5ee89c05f2af63c331fe3ce9009055e63ebf70da78b8efdf45922d68923d6d710af00d2b433cc4897f651ab289c8e51b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}