{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0x591d883f45f5df514a640a8367c9480ae94175189675b03ddf425fae46f2b573",
    "signature": "0x1ed3dfa9322acd5a7d54c5cd6c0ff6e2f23bb342c0627610645b217cc789229c25cf093b2681eb2dda21a478606b8de4bfadcb2e6b0ccf176adcea97f1bc68cf1b",
    "signer": "0xE8D6E5670A532CCA8099b7a222615B795D7E17CD",
    "userId": "617481694"
  }
}