{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121453",
    "entityType": "User",
    "nonce": "0xf064075aee9584962ce373c7bc699fe6b79cc428914553d7a2a6e2b0891f7cf2",
    "signature": "0x6d39ac2b3d3ca9af9f20fac7e871f5f796aba7165a4a8b9c61e67f5c59817d0626b696ee5e9f5126fb73a41102794367d689dd2b805ddd00905c1e85cbb37f6f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}