{
  "manageEntity": {
    "action": "Save",
    "entityId": "533934290",
    "entityType": "Track",
    "nonce": "0x9b82f9029b98d550d6d289ee431a0476630a6005409209d6400bdf9e954aca98",
    "signature": "0x076435f9682132151bce501c4d196414e7bbfa32e2ad76050cd0fc3cba15d63738ffee78e6a9de6cbfda1468b6d72264e325a3fe42d12a4d3721dc459c0f97511b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}