{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x3dc0c4f1a442dae78a50eb1faeb975c344af1a4b597d6dfce4c8acf1d018cf6f",
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    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}