{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7a4f954224c2820615f47ae8ea8504b6e558305df03495feac1a314454d8d0cc",
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    "signer": "0xB278E6E2f5a08e539FF5A4f870Cb91ec5A6a8523",
    "userId": "720480811"
  }
}