{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "44142994",
    "entityType": "User",
    "nonce": "0x6644b2114d10229fb1dbd1fff54e575b5236a6b1d58c4ce54d9d17a5745c3b62",
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    "signer": "0xB40D00E36403aF3B4bdb29a43BEaE33057EE4129",
    "userId": "500138887"
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}