{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0xe790ad85cc9ab7b8d9102d183bc7a2598cedaa17963a63b39571f4ebb71ccba6",
    "signature": "0xde10a8dfaf3a66272cdd82e6de98d29af02fd8df1d67f81901ce128b0e4b685f3aba4d421e83b30e6bf86263335b07873ea884f3d3d051632a922fd9c61e49a61b",
    "signer": "0x4ebDE052FD90d737dFa0Bf87819D8bEA320AfBB1",
    "userId": "507122246"
  }
}