{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0x3bbbcfe3e2f86909506afc7ecabe0ef535c8dac1113eb75e1c25e3f63f0f57d6",
    "signature": "0xf5ef36474c052b1b55cb0a7228c7e9cfe85052811617ea87dbdf45487f952ef55c9fbecd31116b8939b6794f39e51166d95618ab4229f11a14f9348a5b22cb931c",
    "signer": "0xA2431a8293fD33C6289244D08A91489fF2C9f18A",
    "userId": "325308787"
  }
}