{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "35980",
    "entityType": "User",
    "nonce": "0x1fca5e42cbeb5ca68843342142da64cba1f98558621b838fbcfa847aaaa52463",
    "signature": "0xa83a65fb60df6d1f9a02d0a543bb49f754561dac505053766ce1587f78d5169a16b7110e2de284d839a811c82e8e6da5e899acb97a40e3f56d2cc7d33e5d298e1b",
    "signer": "0xb8Bf68e2681FA1A8a8ce9c78070BF9644e947378",
    "userId": "12890"
  }
}