{
  "manageEntity": {
    "action": "Save",
    "entityId": "288116",
    "entityType": "Track",
    "nonce": "0xa30b9b7b981b1d76e20446fe419f9419502f2b3872e1ae622076025b3d045a7d",
    "signature": "0x93744459ee35165227a5c9b4adad9feca07b19896e22f1e7dc511af4e4d4bd7240a2b778b94065188ff0e6ff78e518a726a57bc88cc1dc05c1c68282b51324841b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}