{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc45b4de249faf6b15922a765cd9af826ce84981eb463091de5d72e4d357123c1",
    "signature": "0xa67d7d0484e957440b6dcad9e905f6940c7262c0c59cee87472b4ad68637c2e055fcd09e17b1b43fdf5a028462eb38072ddb2d46543f06c4dc07331d002da1691c",
    "signer": "0xD5dc3D728fB6b494593E4f145f6C3045E5d6b5aA",
    "userId": "423467502"
  }
}