{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "252891429",
    "entityType": "User",
    "nonce": "0x21ddd9577e1200ceb0d3452b7399ba324509384e23173d751a66750c8a4bceb6",
    "signature": "0x3f69b98ca26166f98364990c25a09678df3bffa4906a9aedcad1fddcea81998b7b1f1608db85d022ec233b48fa6012954e42ef4a73e620ddae8d9d0dbd0e54dc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}