{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf90e62a3c2b8d51ca42ac745957293eb9b0366669cdb2a3021a0cc6311cb8c7d",
    "signature": "0x61e5e88eabff74bf5768eb2cdbfe7e493eb4abd40252672f3bce7503c1b87d78666a772e51637e731b5d83272f28a1c50993be167440efb632c0b50503c654a71c",
    "signer": "0x99579cBBf75032De98d51e1f45bC64e75B4B9e1A",
    "userId": "529938035"
  }
}