{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "215428",
    "entityType": "User",
    "nonce": "0x9cec4b00ac0a8ce5a78468061f563c02443068b786e8a674f134c4fb51daa8d2",
    "signature": "0x2ac62dbf3fa1d04cbf9f7a94722028b116dcc0a93478e240e41bbf73f0b86a642ee76da61e1374c15432c842e94e510413f03f100bb5c26042107bac83fc0dcc1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}