{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "511604931",
    "entityType": "User",
    "nonce": "0x3f0a00ecaff69019dc9fe08ff427891a4c1bc92fb3bf395ed240fadaa09c4d3b",
    "signature": "0x9cdb82abe248e636fa478fca2e15664122e64c1e2fa4483ccbc9c8c1634c67a72a30c45bb5809cb152961b7ceeb72a70176ce52e0e63a613cf02394dbc7309891c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}