{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa790da7c52557dd10c99bc8fc6fc0e1367917e4bf9a8d92500cc797550c9c0d3",
    "signature": "0xb787d43f88172531a90bd5f0c70d1933a7d1d2398bd2ac7f80be2ccae26bff4c7c32d81dca02c7264281fb0c638b6ea378d863c1ebc9efe10b572291a7b9fb4a1c",
    "signer": "0xF291b54F34fd2AE432A802A671d5AA6bBac155B4",
    "userId": "201386101"
  }
}