{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21379",
    "entityType": "User",
    "nonce": "0x697f30b7e29bdac39ef567033c6116e9656cf52b05b490f4216e522f1f2411c5",
    "signature": "0xffb64c356388d7f36418878e32d17d0ad3861391e05991e15d2d2f3e7b48a59a355bc7bf5e223e05359216431b6c9f2feb9f9557dd5b9e702a19bc8b3c5f7bf31b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}