{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "838752772",
    "entityType": "User",
    "nonce": "0x9ca3a44ddd80033eb54e6219a4a5d1802042728ec7e01e75814f5af225686253",
    "signature": "0xccaed7896b315344469881de9b1b3d8f26267d421b5ddd2a5512c5503d760ff6308e503af5657e613b814585015357dadb6b69f606bb5203f9f7d3eaac48cbf21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}