{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa90c3a4823dad829d6dd3453e195ec5105d81d616d3914e4c488a8da595e7104",
    "signature": "0xf6788ac642336108494c7e52bcbfa384a3dde7dbe36b2a1c9742dcdc09ea4c4513807298b256c16e92cc3ab7f4bf0fc31ecce0ecd932a842c978e7922f2736771c",
    "signer": "0x4a860F350364043d456D56DBF9D99252A1E2a164",
    "userId": "5462986"
  }
}