{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16748",
    "entityType": "User",
    "nonce": "0xf6153fffb82e959dc2231f62fc7f0c822da87fe4606bbc380bbd4a830ca07316",
    "signature": "0xa1a5f5bb3549562c3b327b9f92cfebd4ed74785bbc2647e352783c3785d9a1c05a36b046a50f52ec725e0f57be187a912295d5a0d06d730db1f48398a50e64381b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}