{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeff0a12f357d66b3649725cacd4a3175a5d0e73849d76e76732680e53b09c777",
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    "signer": "0xAA3338Aa42CA68c43d9e5D9F1b21D06137660807",
    "userId": "958115750"
  }
}