{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152450",
    "entityType": "User",
    "nonce": "0xfb15c96ce4e0e21ef510d1a7899e05f3203c5d59b94f1520c615e1086d47981e",
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    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}