{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "409647715",
    "entityType": "User",
    "nonce": "0xf88dc6a8171025e63c6de721ba01415808935311ee9e3678aa0c3658adbed63d",
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    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}