{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "777",
    "entityType": "User",
    "nonce": "0x5250056da418bc4254566a1a763a7304ef789420440c8cc4b7377d4a20840693",
    "signature": "0xa272fe8b6b992795c4f9a7fe79bb05da25e541e0486bc1b7ffd5be21f8c088a27663926c3d9af9bc15c815849655e4a9e8171f3b9566aa30ad50fa50edc477691c",
    "signer": "0x3De74796B5c00839B7ECA9Fe783E016082d0c907",
    "userId": "29145"
  }
}