{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "278883",
    "entityType": "User",
    "nonce": "0x7aa37696994335b55d7dbe1b3700af6917db207a854d927804ab2f36283c3ef4",
    "signature": "0xc64d45ccbd219bca8fec2b1fc1edbe6cd0b1cdf7d4435e6b8cf91d5c72dfb9dd16a2886eb5e9bccf8e5e56b3222c432f2b779918a0e58c43fd5e9df6c0fc33b91c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}