{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4198",
    "entityType": "User",
    "nonce": "0xd399acd0e7702a6bf2ec5e7e5be70dfd1106d2fb4ac2c0e919452f3ba1609d6c",
    "signature": "0x13bfc38cbee2cc382db7c416dfdee6eabf19e5379a49b2dddd5c9990e55d7a860bc0a99483bbf8f4a287c98c01ff387c0d19a0c11ae8524f633100183f1e19941c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}