{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "757975",
    "entityType": "User",
    "nonce": "0xca3af6c96e7b8a9ceb8dbd27ac972fbd720799c89df87d3252167da5ddc23c23",
    "signature": "0x89c50d5f84f1755d391a8e0e50a483a81ff706e8dff713243d12501380a5c3ef6743d0f66cf40e72577025d0f7acc84fc01bc644738dd1d464a3ee08466a86de1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}