{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x5cb831be0f78e6ebbbad79586788d4cd0c37566d9960889287eab3c1c4132b43",
    "signature": "0x2aa2f3990880d5a4afe967f35dafcce31995690af33a6658a1b388d6d8ed64bb3343c50dbf7ac73583761911a049cb3c2476f88f14250c680544b247a7e907081b",
    "signer": "0x3650a89287dc01b8b035442A3E9e1fdCC1CC2324",
    "userId": "572305760"
  }
}