{
  "manageEntity": {
    "action": "Save",
    "entityId": "799995376",
    "entityType": "Track",
    "nonce": "0xd5625a7c037e4256476537673088de2a041ae06b95315c3d75269e28b992ac11",
    "signature": "0x1b9c752b41cf7cdc1be143004f907f263ab756a5fbe44813d7b467a3bb749b3370071f0054508a21510c566f1ce1832323c9d68d01dd1a6c99090007df89b35f1b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}