{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7d58416d864a2145d880a606c07f5efc82411cb6c005097ffdaf32e90439e2b0",
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    "signer": "0xBff23A058921986392a0c331D8860BAa1466d604",
    "userId": "53147192"
  }
}