{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "464100900",
    "entityType": "User",
    "nonce": "0x5f6ec95224cdf7e9af950f752c5d7054e6db5f261b0d4e0977cd039f5c666069",
    "signature": "0x57fc4dbe236ad39f18fcf56e5aeaa1a17b76b803b4fb4f89bd2559a777fe50f1518412f53851c3301ec5d266f03392cffbb8a1e7248b6fe973c5dce9ea6331041c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}