{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "377242874",
    "entityType": "User",
    "nonce": "0x9315d0dcfdaa7f362284422977e5cbe84add89b904872a03059c11650b4bcc31",
    "signature": "0xe412f2a5a914d766c9c738a9b9f95f8e64bc095ca60f9d3dfade0487d9ff862e02aa1356b050d1c5e6b313841f64129166bd69d17f54ddb3e8557dad5406dcb71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}