{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7c86fa9f705c17fa3a21dde66d10792718f5c92520412db42b1dee9c429415ac",
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    "signer": "0xC9860723E157B83dFd9818473B920012f6c52981",
    "userId": "24161709"
  }
}