{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "103520",
    "entityType": "User",
    "nonce": "0x9cf8055983471ec00569f05338e14f9397f5819750b347b411a50d6ad1b97eb8",
    "signature": "0x746a2078ddfd1596ec0c32bafd9d66ed2e74c61be56e816841b12dcd62c5d9e74195c6fba876626d8df29d4bf728c8ef0a8785091ad2165909623ea3e804e3741c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}