{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340142965",
    "entityType": "User",
    "nonce": "0x1a3cf07f0f2547dfc2a520644bd72a0da893d8c59249c4ca3792d5e5b65a7ccf",
    "signature": "0xde6f8ab74c0126c92fe9e27adf5b431fd853b4a93cb9a296221f3ff7eb910b3020fa25bfe5219ec9f809626e92bcbfb281f31b3ea60d84aceee9712c3820bc7c1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}