{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb9e21701bc663fb90cec4f0cafb516c887d9852d9263ca9768149085c3e4bda0",
    "signature": "0x3f019f354c46446704d4270888aed5320b224f4f936184c5f0a7dcc5e71aae6404b3385eadec36ec230801a8a85dc7a4be02f69390ff8e760fa8e0bd604605821b",
    "signer": "0xBB1844fc578b0f6D14703d2DF3F99492C2B45e53",
    "userId": "440864340"
  }
}