{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xe34eaceee8e57f2d2eef25168d7adf54631389f56ff253ded18c29d144df891b",
    "signature": "0xa7dc8f935cf7fd6d3d886345080025d6e1f6fd244a512c05ace7f3dc9473b4361be17e19ff691411fbb5250171f94fcc0acbd3dee91769936b5542cc2e7ed0411c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}