{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "394187509",
    "entityType": "User",
    "nonce": "0x502c6d04b56ffcc91ef300c4832bcf516bb7093c3a9589fa3373d27369948e48",
    "signature": "0xdc4f5c86f7fa1e5d868b043c999d53fb20539778d6efaab1219ac8e4854e14b03178d208a834da0eaed9cd0948f71242a9ed86770a3b2d4bd83f5719299de82d1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}