{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391524",
    "entityType": "User",
    "nonce": "0xb81e5c6e3e9c324fdffa854ccc5a16dcda45ba1d7c20f0879a46852970803f68",
    "signature": "0x746cd539d3929acd7db50df415d4c42f0e329f584c4063f031e8db3587507509160198f2f333003846a1a58865382da95ac72b2683f2710852790edf31bb427d1b",
    "signer": "0x4230116F60d3989D218B84425D3D1Dd6C85e1393",
    "userId": "86128800"
  }
}