{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "568518925",
    "entityType": "User",
    "nonce": "0x8d0e94db5c60267fff5707611d57fe98df3444eb24d4186693acfaf62d708b5e",
    "signature": "0x475afbc0bdf6f825d1ce9f0dae6a4e00624d6eb919cf718470fa6f406f06c98a309bb1fb3b8571a09f6ef81a1db49d6dd6c5220b54ee26aa73f9d09bcb44791c1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}