{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x50820a2c1e407c52f6c9fac9664b5cb9bc121a087b3d8a58f122b04fea1febd5",
    "signature": "0xfd20271e487e0e5c9c8391f496528d039c497213a3f0d46c9f9e4ff8da89f878363a51ee3d182c1526538d4e6b18746d6f14b3bb79ed487957796059c66a7f241c",
    "signer": "0x97A48CDe9eD5Ec07148c100551C5e772f2667403",
    "userId": "28372811"
  }
}