{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75943",
    "entityType": "User",
    "nonce": "0x159f7ba8c330cf8399bb3b4f4e74c08b8e3f47a5c0b884ce8e816325dcbdf3a1",
    "signature": "0x1f83d7eba98b1bdfdef75463fd4d836409d74391cedb1eba486c54f647b11d477d83222dddaa66f554e79a7eaf526dde62dcfa2372ecafe1713cf6777bcf9a631c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}