{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb5a193f1e6ea503de1f88223af808b5779a493b7b7eefb938dbf74e24ea192e8",
    "signature": "0xd26788bc0106798cafba46d69e1507b7a1fd9e50ed82b83e86bbbb258d8d699e3e379036748e71c5919a3d3f5d6c24b3fd640b8c01b5d7fd6fc1e4d3292e4a1d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}