{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb5b954246b355ac170a05c0fb6493d70a2bd20214d3ad731d166cf537810f0e2",
    "signature": "0xf065cde158f05f2f992234d3575209c2bb24af0497ae22778cb57f39c594714e03da11f9fa4d90b69111766e58c006c122728d2e6d8c5d66e24c6c600e9124c11c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}