{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "271639",
    "entityType": "User",
    "nonce": "0x77278a72d3d9916dd0ee24a8b7d31aa68b97a7dbc47e161429c495f145be791d",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
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}