{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "43720",
    "entityType": "User",
    "nonce": "0x555478d9e01e6d58c5ed62b88d34c37e131d137246473a7af27e84d585f4c66a",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}