{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "254551",
    "entityType": "User",
    "nonce": "0x2f341d2a9a429b4e8d846b6efe68a279add3edfde821882d950cfbe93bf78eb4",
    "signature": "0xd75a7a23c95301997fe3865d39ebfe770f8c0939721da680f694a28b0ffdc92114adbfc2b1ac545d9ca0fc15fd4bdc158cd25b270e7a052ffd70378df891d6ac1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}