{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "357699",
    "entityType": "User",
    "nonce": "0xf54b4f3ac1977f9e2adf616e14c6da1ff4bcea63a5c0fbbecf37dfc993542b8e",
    "signature": "0x5a3fc1e5e65268154394c6ed94355b856f721af03365503907f8135717efc8181f1d56cad50f7889bd689c18f42a60d7fd1fd0ac9dd78e9003e4e8b624e0c2dc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}