{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x8a5620cbb85d70c785636c4d8a7c876e1cb79402ae1dbb95e858cfa46ff0b5a2",
    "signature": "0xdc77a4e8a3c79005beb801de272667931ea1ca263959a9d8b5045b660fb106a119e3a20fee57b7558c286a6bd3fd5699cbb5589e9aa0c31fac0ba71d8410f12d1c",
    "signer": "0xe23f94433EED8958AAF9868141BA976B8fffb969",
    "userId": "307915745"
  }
}