{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "294973155",
    "entityType": "User",
    "nonce": "0xac7a50028a9dfe93a06ed406f535e0c23f2533440d0fad2a0ea261115924abba",
    "signature": "0xc2f49eb8e587873497070339ee584963b587c2526d88db4cf0d52b54c34466ff539e8e9c922cb60687ceb0c6cae828b8c0a789dc45f192962f5614b0b7dd3e9d1b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}