{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18278",
    "entityType": "User",
    "nonce": "0x25b3987f38b44127bd740d3cd75be79a1ffb905c01b22a6cecc19f39af214948",
    "signature": "0x5c5ba72ae2b3049f048b1705ad61472972a29800e83eb6edda0a7d6b8b3fde5b56fcd6b1a182f1ddb03fde05ddc9b2fa3facc3184b86ae1fbd77e1cd03c9d6991c",
    "signer": "0x209a0CF4740270A23570cCb3267a65b0d3C37a6D",
    "userId": "188887251"
  }
}