{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137959",
    "entityType": "User",
    "nonce": "0x66b8dadd6b8edf029c149430237eeebc047ab5789378d614ecf20a9b5927bbb6",
    "signature": "0x550a3d9c387b73834c29680819268ef33d996dfac61983eeedb472721c58093d608786bed272354030c46379fe7b66907eaa93193581e43713d7455af043bb7b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}