{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681864718",
    "entityType": "User",
    "nonce": "0x3880bce57c787c390181260c0551dbc42e7335f4f92ddf49e44bc12e2b311ae2",
    "signature": "0xd0404e0fbb658bf2a59455dc967a3ada09de4501925322b8fda05b4ce4c07bbe600af6637a0b6d36995eab924d3c5b944b439e3a90f5e1f50d7473e21b5459a71b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}