{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273007816",
    "entityType": "User",
    "nonce": "0x6408ab44ffa746b83a7d328334c5bbdf1c556886f84ce97e04668fb4fc4b1b72",
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    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}