{
  "manageEntity": {
    "action": "Save",
    "entityId": "1382700390",
    "entityType": "Track",
    "nonce": "0x1e1e97ad729fa4d5fffb76edda68842552cba93f7ac5a6398ae909584d010975",
    "signature": "0x65660a9560b67f3673cd7018da251249cff894873ce28eeee24a8473bf12ba4f4525ab8cfeeaa3e2c6bd35e90b2cc437e36806cd3fa3d52eeee749cd06bd9ca11b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}