{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x71fbccbb13bd70289e41ad1397533dcaa88f8ade60dc1b712a90228033654dce",
    "signature": "0x20b85736e43add113edacdd95f042145a7a29cb01972da9e6a32f00c428b57e5285de5b31348827b13f42daaf141c4e4d4b1a31c9fc79df2f89c65e0a20268151c",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}