{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x07aa17ff320eaffaaec5e8a3c5a6063bdc56e3c6608e606116058f70590868c2",
    "signature": "0x71fb85f96afd6bd3bd2519abcad69bba526cb91be76bfbb80da65fb68f5f80c87442e311b3dc5d38b18d5f19bf4d6f4064974d3bbc951ab7fa6234d91b2bc73d1b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}