{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeb99a695d5f7a3930820c5cd162f815695929c686332eca8c200913e0ec72e1b",
    "signature": "0xf91e8c70647760e643ba663322419ab0a83d615c820a5bf24442b155f1dea61776608a9c3e06c19195fe82b65aa414e44bcf75e8b7f8ca7df5615f6f77a189911b",
    "signer": "0x35c0f75c76D1F4E703C99c03b1b7CE133166E883",
    "userId": "609668942"
  }
}