{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "491018039",
    "entityType": "User",
    "nonce": "0xc1152198ba7d3c298a8dd2411bba36ec188e7f4109362d032052fe0e668b176d",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
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}