{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307888",
    "entityType": "User",
    "nonce": "0x9ba66538bf3b570fa175db578e37d3fc34c8a0d92f9c6c6bcc99a00ac6eb5231",
    "signature": "0x2011af1d8241c725e81eb12878221454f20eb9ef5beb53f981c5c366a5ec9857294d0b29a2a3583074957c5d9bcd76bba75d8d3ec7091decd5e8496da5908b741b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}