{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "771602835",
    "entityType": "User",
    "nonce": "0xf22921ca03bbaaf259909ca0953ac63b7743bffb0f4a26a98472472f65b92f44",
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    "signer": "0x50809d340e06Dc1FDA3f6DeC073b37Fcc422508B",
    "userId": "447853505"
  }
}