{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "13721",
    "entityType": "User",
    "nonce": "0x904f48def714e360b5524d9e7ceaa8dc85e891059191fec692c4f6c479150887",
    "signature": "0x8edd2d4cb02a2e99e804f658ae3740a04dbc7223e19a0a454aa50e62912c81863c28963708f0014e1dad9a831da6e8fc0a8cc0fc9ca396a39f607bce7f7242b81c",
    "signer": "0xe23f94433EED8958AAF9868141BA976B8fffb969",
    "userId": "307915745"
  }
}