{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x426857600a258ede1fb90949fd4e8e4784e9f0f0d0fe2e0309f6fa49d56a6634",
    "signature": "0x92e93773e1a19f3a535f3e73bbef80ee2bb7c04c58780762e3abb43fad82a5ef77322e3f59064bbad5f66ff6d8b03464b8fa17f943a048dbdc36ba67dbcb1e551c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}