{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x495678e650498c386c3b9fb545a1e30aab2f14184a8d445f3f4694c32ba51b73",
    "signature": "0xc5f30cb5b345cd7947c953792458d0e7d590cce78f9322d7c29e1b64881acc792b28a5644913b6d441ec56a55963737c540f24b061375cc2053a69ecaa19483e1b",
    "signer": "0xAd3757d5Ae971886FD92A556Ee95c020223b34d6",
    "userId": "766262550"
  }
}