{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0x917fd3ac6a85fe2f2544eeef8fd31be2a14216d4729ab8284630c8729d10a067",
    "signature": "0xa034e4349aa963ba2d56cd60fb766823d3bdc0d6d4d42fef74b6bd3b5d52f62245bbf2cbcb71bd07102e7d1bd2c2f6ac71a1ea4a8299813b62ec4ed1c842ce9e1b",
    "signer": "0x6479d9720713f53dc89A54A1b2812731e2cF028d",
    "userId": "159329749"
  }
}