{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x043c3f370c91391af7f6b269ec073cc2be3cbcab221054734fa5446e1352e74f",
    "signature": "0x7a7e7c4b1764cd304d4ec22be2271827463cc6918d64e3ae9ec466a394e350416bf17e54cb6c6eaa084a6c996d110f4d6fbb4a41f6b77712ba65bf66118ec6a31c",
    "signer": "0xcBa8362f4620bDe115420aee3CD7E34A7B9ED3d8",
    "userId": "740958621"
  }
}