{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "320440",
    "entityType": "User",
    "nonce": "0x7d3c428fde6b635b9ba9ac547daa106ba37e8fb76313ae6a3a3bf1f0d8a50907",
    "signature": "0xff00ceeae57a26bfd85535a4f677bb2575f358a1fe34655bf12498e7d91e6ffe3f127a8bd1fe2925ef4b5a26e84ee6a254df137266605bc9c3639bec1acf80831b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}