{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745782781",
    "entityType": "User",
    "nonce": "0x879282d04c9fad678ed84a6022f7529c78cc71f671aed2df46f918d1634a62cc",
    "signature": "0x1210f6c5502f57c2fef9efd000c201a3f397be711472280f5d7a7265bd43cce7485c6141b9302d0a8158343d815c05e8d981a0acccd8c2f7f64b932940799fb91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}