{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7c653d35a5011611079fddf0a63bec8fb4f8a3d1b4df50d64ca322fddf57a5fe",
    "signature": "0xbc1f2cb5e1204fd28bb0af0ba9f8b03b87be2160a8c12f5d41819352fd7bea9e799b5b7c5a55544deccf390259f7ea0a41bb94922575c6f1f746d4cea37e42ba1c",
    "signer": "0x73BD7C4402B3cF480115A19678a393865851975e",
    "userId": "748940012"
  }
}