{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x56b1c521b6c7f4853b6169b6de5930c9bc88f45f599a173a327c171924d54369",
    "signature": "0x4f03585a23b1ac84b9079dac3c336063b54d7da99f1f78c9226458f46743d8ea6a26f0a70435230e55d2c54d3889cd579d92bb31eb951ff529dd9a826317de8f1c",
    "signer": "0x0E6Ef8dF2F401D8918d603B82ef321D94A721556",
    "userId": "648802251"
  }
}