{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8b8ca62e622eb692ef43901e59066119b6ca068da0f3c9ca27e71930ac8d9dbb",
    "signature": "0x4b8f03a5430bec538f46016c95a5e82458af759dfabd850ebdaba22ac47f09032a22ea135548507f2f55750550cd3d64ac414f1386e97f6f7ea972588c42ef4e1c",
    "signer": "0x1934b9F2b24673B8B682058E6B2EA368152a03DE",
    "userId": "990570778"
  }
}