{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781543844",
    "entityType": "User",
    "nonce": "0x1bf88e70e4ac18ecb95552d81bf090d51fdb9f691b56fcfc03b0f688af657b51",
    "signature": "0x45242354cdeab719bbc44c2a680919d1f4a03ac971f5d496d7f78759361b98ca5681e01b8cbaabde228605e4f9fe030e9bd8ec7c7e5c66c0dbafe9216df5b26d1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}