{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525568838",
    "entityType": "Track",
    "nonce": "0x982ddf8d9a4b962768e2ebb0b4223375bbc11ed90fc974de46f03d582e52e574",
    "signature": "0xe9e9de8a24fa91a10498cf5509ff0a718eff7b5d0fa4755507ed6413f22e924a6fe27540b546678572dc32ce6f16c405eea4f425fbe8aaff83354d65eb9a84e51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}