{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620550962",
    "entityType": "User",
    "nonce": "0x97849e2ef346296f7732a5ab8e66986e4f396443f96d41ae4963af3c1a937f5d",
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    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}