{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xb4140f43552acb52785df016d96e700665b88b429e92e7197c084ccc93a60a31",
    "signature": "0x0093fea16d77773dbedb8391091cdf10ec504fc44d955379254b57f886dd6e112d21bcb5ca6c4625b97cb92adb789140da6323acccf501caedec433ed6319b031b",
    "signer": "0x8838cB510ADd37b71093e4FD76B81bdd280860f8",
    "userId": "674339889"
  }
}