{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0x812c790af38f4291e3760e4d9d02817b54b132c25fd5711980c340c5a3f19440",
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    "signer": "0xBEd052148865fe7f70aa0B2c04705BC05e77D4c5",
    "userId": "490321291"
  }
}