{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303507",
    "entityType": "User",
    "nonce": "0xe44e387ad0cb7aa7f5b534ec3560e66773a106c18142720ead9cd9156e9d2e45",
    "signature": "0x53a10bcdbb551ee5cace6289398908a1a6aff11c964a149c0abbd5008917eab505c7ffde518d38545c69da8e9f174f7c40a1b58061a4b4773c4644e15f3d9c2d1b",
    "signer": "0x005385507D169DF7Ad14f23b728248Fe5464Bc26",
    "userId": "303866152"
  }
}