{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "173510966",
    "entityType": "User",
    "nonce": "0x110717955f4033a0173d0100e74483ae9fb6baa3b3765e56ef33b6cf9b572ea6",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
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}