{
  "manageEntity": {
    "action": "Save",
    "entityId": "43076349",
    "entityType": "Track",
    "nonce": "0xef17d701aafc2342dbea8f3f486318c797173ea508f851d8eaa9340e6a849ab3",
    "signature": "0x05f92db51daa877726851e4c7dd6015cccb4511efca1e1ab9e66b835620501be58f7e29781b08967628570317485d59a96e9c54a579d57a23b15243b827c5af81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}