{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xef42dd3dc6eb1176323332af5b587819c55fb2434c6d7458862f50ea4bb8c106",
    "signature": "0xb0f7c42f1acaa167a5859721671d39a4a3246df25471aa36f95baca8347af4f214d9642f30230113821e2fc4a91bb6a4a23293c0b1b2efa4e0bbdd50393171d61b",
    "signer": "0xf409603FD127F3c9F7A7bF4D84384de09fbbE09b",
    "userId": "973348610"
  }
}