{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2989",
    "entityType": "User",
    "nonce": "0x69538c87ac7b9fc75af4e1fb32534cf1f33592ad77b62f5ed445adeac5da8f0d",
    "signature": "0x324b0689a89cb0b77397342a1805cba983c59ce31d363740b02a4e7d2abcb54d5c2fcb1b82c6ed0e9b51ae4181091971c0123816b944ab5098641a24834a19551c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}