{
  "manageEntity": {
    "action": "Subscribe",
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    "entityType": "User",
    "nonce": "0xfa9d2857aaab44cdbbeecf7a71fc114bca870e25e079d8714d63d236d7ffd20e",
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    "signer": "0xD144Fe61E486319F0aed3A158008ec094C04Fc49",
    "userId": "298221337"
  }
}