{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "975024041",
    "entityType": "User",
    "nonce": "0x4be98ccdac399056e13f3373964083e21eba5289e8ccf53331914d2a9d8ff52b",
    "signature": "0xfa778b59d6c01230000297027534e7efc3ea6e16b9d66cc1bc75fd66305f839432e0d6bc1e92cc05a0985e8d34585641986e530bd7f93400c14fe3a68c43b0071b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}