{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "851436",
    "entityType": "User",
    "nonce": "0xf41a1d8a651735c9fe0b16bd81c6784de49ac4cca136c215c324221bd6eac144",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
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}