{
  "manageEntity": {
    "action": "Save",
    "entityId": "698701746",
    "entityType": "Track",
    "nonce": "0x9e6e6f47fcb1228e124f31d8cef6d8379f6849b38c09154b722e310afe515588",
    "signature": "0x6117e669866ab8f511cc948bc31d55901335dfc5896ff2ad9959f00ad05fb1e72cfc06c9ec5d0930d3d2d43086fd69755f49877b33718c7a97a228bbc37a1c891c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}