{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4138",
    "entityType": "User",
    "nonce": "0x7457afacd84c9ef7c052df256ea011f233ddf1f8c1df5ba4b0f9b281a8f02b3a",
    "signature": "0x8c9156b23661c410f526ac803830109c7395ad13a437b443a82b20995e4338b130dfbf56296073e99addbea39e0299428044a06c3b8ac42f9df8046799689b471b",
    "signer": "0xf4932982eB30F083aAeE8850Fe5d411b7A5Df5a5",
    "userId": "746635137"
  }
}