{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399878",
    "entityType": "User",
    "nonce": "0xde46e50535ff04ca6cef91d683b28ad6bca5db7d16286f9e6574861a73e3e4e8",
    "signature": "0x54d717486fabbb7c0adbb6e1e9cd487c58a923d833ed40482eaf2379828734245249b72a1fe1aa2d84351d473be5c8e2a86d8e3551707216a9aa08bdb9a114e61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}