{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "328856",
    "entityType": "User",
    "nonce": "0xe66e3381da06b7a2b19dfe19ea57207005e29c89b292d7fe2553d25c303712ef",
    "signature": "0x9a0e9f374597de189443a81c00f8d5d0bba8f1bee904b3a9ec8ff591c5aa29d6047ab9cb5c86b6dcef3b92a3f68f5dd6a204cc5dcefc3a7715ba8af74c73230f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}