{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375231",
    "entityType": "User",
    "nonce": "0x19503c4bbc430dc745a2c038148d3c4d0d6bee9ad187176d207a51223587fc8a",
    "signature": "0x6fb6b0c0b7883f742f9f85ea13b6e0ba6a70cac16d4690067e477ce259e75d2d36fa5e92c7ef49bcb3af48cd93ba894c5e05adc3c21ffb9fb151e7b14c0ee4701c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}