{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "349488",
    "entityType": "User",
    "nonce": "0x667565465e42c9d1019297146679e5e94601a8844f1979a2793a04c4f1629930",
    "signature": "0x74317bcac08e4375d7ac009a0ffaf405d80c8088804805ed3acfca27bba1cdd331c1308dcb2c3027b19fccf5a7460ba58c96f70ddb9a4a3ee9c7477a098f56fc1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}