{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "757523374",
    "entityType": "User",
    "nonce": "0x5ca76ef7efe8dfe3102c5cd5985b5dde3a76f56af46073494f6261cedbb6707f",
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    "signer": "0xB63c8A7B935b55823f383e8f19B6207FB6b31168",
    "userId": "330374208"
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}