{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "998122022",
    "entityType": "User",
    "nonce": "0xf76ea7d6f707c1a3a615e85d91d0c499c7dc8e8b5eeed1916ffda76863463648",
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    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}