{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x12a407cf572db28b9ab420492c3163a7c6aed7eca6aebff9af2ea2051e194309",
    "signature": "0x53c709422e0647930b7f42d7abb861cc43ff25f86fea06f309bfd10f489922d330fbf2d3d8ab37de2e338742289f9fccee0234a12d1d6ef3c39c499fd17b0e141b",
    "signer": "0x42df0BDEb8214dA19B055205bE451B0c3a3c1bb0",
    "userId": "77436"
  }
}