{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900305126",
    "entityType": "User",
    "nonce": "0x15de1fd331f86667561058e5033e27c0874b52ed1a8a075a60b3d05f572ed390",
    "signature": "0x52fa6c2838be9cb2121bac07e8d7ea7be546612d54220fffa2bfd8b001654ea00a2dacfd6634257f977f1c6a8ec826ab5d3f384814155642db247b90eace92fa1c",
    "signer": "0x7C2169544c0568cB3b210f320356B6A77E891F30",
    "userId": "495616082"
  }
}