{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "315121",
    "entityType": "User",
    "nonce": "0xda6801f7e2a8ed6ad6a98d64b93f7cff905a2b0c41edda08df399db99090a942",
    "signature": "0x2291efffbad404f55c65d82799d14a2f85beccaa7b71175dc36251bb41685d790648b2ed89ed3b79828f10374353fa453bda8a5c97dd90b0ee5a82c57e2eb38b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}