{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123439",
    "entityType": "User",
    "nonce": "0x8a37c5ac20eb52f3c83c947f7e078acbec434296b3f2dbce64c2cac7e5090249",
    "signature": "0x1d36b8f84edb1c27599118fd45995ead5b1ef191e1017659b5e5fa1599c1dba44877ccc43416a0de099f6deb54e122727c6b6bcd7deddef6b5bcea474af5cb571b",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}