{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "377839503",
    "entityType": "User",
    "nonce": "0x1781f1d666aea175f55431d0360647e40a99d4bb816933ac28b847b5823093cb",
    "signature": "0xb8ae3707585e134e513c4e3051e9ff40030d93a577030ea07c6637e2a66a29e05cf1171a70c9266183080d6e6e21fb702c43affc3f909d8fe0a13e0fc0be46d21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}