{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4ace163ba8475ee9ad7ccac74a99fcaf19f48c16e80e431fc25ac0043f360e67",
    "signature": "0x7470ae800919834311a6b4dd8d7b7c8e74d45e34946d3e5e2c5b75b77a3f64d4550352158f6718d69f27f6a3d3a7e9b4bb3306f693a77ffd39432764a72b692d1b",
    "signer": "0x4a3251b59afFa652DE3CD1C6fACAF517bC97c9A8",
    "userId": "321193209"
  }
}