{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15397",
    "entityType": "User",
    "nonce": "0x4fb31feacd473e6717d1c562c5370e26426b824c5b4beb43df52c650584b9cd9",
    "signature": "0xd971a8fb6c494edd93211c7fabb6be3e9f8a1fc362cdcf39f92bf765027ba127551340ebaa808cb333f02307394615715ab24923f032cbdc4c7af08e3b7279fd1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}