{
  "manageEntity": {
    "action": "Save",
    "entityId": "535356529",
    "entityType": "Track",
    "nonce": "0xeedfc60681f13036b3b226adf56f475f76320641dbbc3aed23a4c9248dd2ad05",
    "signature": "0xa2bd9ddc476661846790d80c408f519c737a450443f811e9ce3996e5dd92f89d0a504a7d39c9f2030adf8d506298677c1335e074ee49e654b4e274f701df59e61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}