{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259006086",
    "entityType": "Track",
    "nonce": "0xdff40b74e63f7008f55044d8e78771d230fba70b69bb2b2b9f0af190b7a1baf5",
    "signature": "0x975b1ca627b2eb5f8b76e057af98ee60e37c74fc6b0ea86b251853a677cb98c97240a039e5af8f13f50d50608e85b73e2b3cb776945d826da0ced22522ed4ae21c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}