{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "135129254",
    "entityType": "User",
    "nonce": "0x77b88cd50f965b281a77f46c35955f5dbd260fec4f064a3c5467350206484b68",
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    "signer": "0xC509a4d32A2b9226304C01aa2D034356E0be8fC3",
    "userId": "273063674"
  }
}