{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e6f5d5b1a28fde8fc9471985f8dade1370d2a338027c2f188315c3b441ac276",
    "signature": "0xe4023b8256cd89365421fe42217eb6ec2667ec531828beaa3d25fc2b51483c7e43acec8dfbe2dc3c5872a517391ad6ab972c6d725d6b9211fa77b70b26f3a68b1c",
    "signer": "0x9D016caAA8326ba9761F0365FD6914002316C2d3",
    "userId": "371874374"
  }
}