{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321125642",
    "entityType": "User",
    "nonce": "0x4b7f7909c98c26ebbb12df91922c55b6161102fcaf4dd98d663d99d571e7232b",
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    "signer": "0xB6f5AB1800373C495226392c2cc7dCdDeDdD0C78",
    "userId": "38340762"
  }
}