{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "253360517",
    "entityType": "User",
    "nonce": "0x1b163e616c8a45f8b8c56a5f2f80b79c5cd4521e92d876e82d0c04e9597f291e",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}