{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "43430",
    "entityType": "User",
    "nonce": "0x44ab6563339b87a38e57bdf5b95b22eceeb45a499ecee400104935598cc81209",
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    "signer": "0xD131D85dCb45420123612F0E81b342109e2B1193",
    "userId": "91368423"
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}