{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1708421",
    "entityType": "User",
    "nonce": "0x198e3757f60f72d85c723c3cb02ab74ff5563bddb2318ef1c196858efc9c0158",
    "signature": "0x8206321ba6bb4ca83e4d48c29c34739cd3b69f0baad3c388da65dd359f8aa7ab784b9eb7a27d569f802c5490da88030b89fd26eb246cdd1ba55c3de3ff44e0ce1b",
    "signer": "0x45C3A85D065D70D1241a75bFf16D9742183d5EEa",
    "userId": "883994940"
  }
}