{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778838490",
    "entityType": "User",
    "nonce": "0x39d4719082b9065030dd515e3ab3d386177ea6ad50a88ed6df49b3dc31df4c79",
    "signature": "0x2f789b9803a162fb7a76bc6477174f50d8effbf9ecaf4f12fba37254c7b5d63c5b916f3023408e5f54f2c1f6b862bfabe70ada8d44083e812a7a1f20b5fd08f51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}