{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0xc7ded9f196f979402c0d0f7c2731a81f38baf4731e56cdf17e66b3288c263123",
    "signature": "0xe57c1dd5397f6b7a8cd7ed9dec9778ec5a470126d257a69ed70525fd19fd7cc37a8d4255f689d31322d7e42cb536d96e0c1e8e3c18725c09d53d98780cefb2751b",
    "signer": "0x4D1242D0da3f49195E59794290Cbfd833cCD04FF",
    "userId": "627952347"
  }
}