{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "124",
    "entityType": "User",
    "nonce": "0x4b393bfad80712958a0bc2d1034652a3bed47c804104391ae8cb2a89ed5bcb70",
    "signature": "0x6cc964f6afbd0c109b1eb171380d96bf538e9badebc5a7543e2c75f06767cb681c30808d14551a33808f25ae8c2750f70e12cc8efe09ba388a6bc0b3b6989f421c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}