{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x14d7b538f518a1d280e1b8f2c43c5d42ca229c0722ba77d6eeec292e9724bd0f",
    "signature": "0x15c793778bdd4b703c47ab2fa4bb00b89ee9a62be1524fd1c4f235eca46343de0e4fb8afce7f2e62ed212fcb7cd9bcbfb14dd484fccb77a0731d7a0815d1c1b21b",
    "signer": "0x49e936dc8f764055F1A37Ca3e07C03F640E49079",
    "userId": "616832616"
  }
}