{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e91514fbc2fd939f3cf79b806eea42b51892c98f343cd631b943d2ddebef6de",
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    "signer": "0xC586ad75a64735d0824d88F0BaC2582860C98f5D",
    "userId": "447123576"
  }
}