{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7155185393825d4e7ea9adf9cde0c088d996d92e1c999220a09d75c95ca3f91c",
    "signature": "0xe024d1b406731469685602efb0f69266a25db50604842139ecb0173f42ad960e31e8e5424f2a681e82da2d92b27d972958e3591f0f3386a07151aac670e5ea8b1b",
    "signer": "0x8C8dF31EaEF9d2E7e5e0C9Be2f1aD120dB9FE584",
    "userId": "328973860"
  }
}