{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "776420",
    "entityType": "User",
    "nonce": "0x57b489807dddefde4178a052345eac30ecbec203151f69d00af2711713892e55",
    "signature": "0x4a56fcc08c6a93f16a36584235ff803bd41e6382d22a53dd84969f0d492037e67daf8bb5fa15492f025ac71db732f37d39e825350b1f23c1a8db32e06919da771b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}