{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf3e99172d7b8fe74d01b0529787910aab4cf9f79c804efc786cfb116772cb7b1",
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    "signer": "0xD15b5650C22a02eE5Ef2Fb5a2006dcB425532122",
    "userId": "538828005"
  }
}