{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "549308188",
    "entityType": "User",
    "nonce": "0xc307f423f439a70bb35cbc25c43bc10786c14c1c1e8dfc690f456b0b2a83e20d",
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    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}