{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "509171098",
    "entityType": "User",
    "nonce": "0x6ab318edbf4ec2b1c98331b617a006a44f367c170aa990d0557ab54daf5143a8",
    "signature": "0xe2de6452a59d84199fab4908b24bab9ef5cefbd391b6903dcff6301b0e4d34ab679c545d435056646a78a6a29a335273f394b15c1f1a4056fddf6c95293650231c",
    "signer": "0xF5C198A035503518a579b15Fb9eE834F3b4b1bAB",
    "userId": "765691673"
  }
}