{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x248e5452c2d8a876112b6d1c4fd62abda50694b94726f9bf9041566f6469ee82",
    "signature": "0xe97c42ed04d494a336da06fd11c8136852120929650b4d2824a47b0d2d3dcc9925a333d60fb97146bd4ae868b26465bfb066d2511d54819159bd1d39b91ded211c",
    "signer": "0x9531C4bF6aae29d8e300a207cf878b392F7636D1",
    "userId": "661927654"
  }
}