{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300990",
    "entityType": "User",
    "nonce": "0x705ff5e26f8d5373df95649aaa675270ff5fec80c29c7e5b371b444e8ce54e81",
    "signature": "0xd937b007a7ed57e5250b1b0cbc84f5e8ec645720713e72fd01209d87cbcd6ca627e3d9350d2dd377e785833103d6b59197515edc50aaec8c43a5775a4cf6e93f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}