{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578317146",
    "entityType": "User",
    "nonce": "0x990c692b8561147b8504e416db6e559b7b6597b30be11300e25bcc3d5a1a42a7",
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    "signer": "0xE795526f098824a87a94C79d58a4299b51b20a3c",
    "userId": "837713671"
  }
}