{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224694307",
    "entityType": "Track",
    "nonce": "0xc8a367fb1c2e81d4516cc1b7768342cb78009a27709e6a37a20a97b0b7c5acab",
    "signature": "0x04592589fb6667d02caaf808e912e1fecae2a5950ea71fc807119d6976769e232aa089cf091b0eff4f4fc1a95c4ee121ac2a6b6df4b9a9c7526c21d93356777f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}