{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3557",
    "entityType": "User",
    "nonce": "0x9fca4291a08e0669afbb8bb2b1a80c9e0df4b6ea92013d4b1659ea09a1d1a045",
    "signature": "0x4a489cb55271190b60a2236dd5c2a090a36853bc4221514ecd9eeb5d90842c6f11bbc4d55b8cca10672561a87714304558b930aee9e6fd0c678fa585c65a83561b",
    "signer": "0x6818B889bFEAe14D2ADdaC4dBF0eAe75779d7Ac4",
    "userId": "341292657"
  }
}