{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x1789c72bfd23c9ecceb273f4d8c9f50172421e70221e63871c5fef1030ee7242",
    "signature": "0x79454d111d3c361b6921a794b727ff9373f35787be0230650162073b817b484f62b7cc8242c4807229efd2691583701520bc7502b8fabf5d84774535188d05901c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}