{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16561",
    "entityType": "User",
    "nonce": "0x6a2769ba20ea7895185cfb3fca3c5d4772badace5e4c8ab5b59f74312b51a760",
    "signature": "0xe7d2f808a8cb9546cc795a85608a2e3ce27f527a51f75afdddfe29d3c675b9b257e8bade0ca96c5007cb681b651bbb5f6366b10d1adf6d7fdf900f403a03a7f61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}