{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "489026160",
    "entityType": "User",
    "nonce": "0x484bdde4d6a230bf48d5e3eefb0fc4a8a6df55b4b1544cc33c22648b1a6b8582",
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    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}