{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748010181",
    "entityType": "User",
    "nonce": "0x443d97de7d3c24f3d53c9d4bc8791599dc3a0002b313cd02a46d3414b9341a1c",
    "signature": "0xae783866ae1c973a610888befb34526efcb092a2199c95bcfdf48fea0db90456364ba1de15f9e3df9e6e5f4d141b3a9250e3d7b226b86c017b3464145ac5affa1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}