{
  "manageEntity": {
    "action": "Save",
    "entityId": "2022964431",
    "entityType": "Track",
    "nonce": "0x53718459f97452f29f46c6ace24b39cceeb5a2911b3616bca65ce2472190fd70",
    "signature": "0xdfeed0023262f711542c4f5122cbf0e470cc6d32388417019543db2780bb80ff574321de721bce8b377965598199539be5d16e5b30afc96b46c7891c9f699a411c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}