{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x543f53496987ba4ecc1d815ecc778ac025fb19af22297be0082028bec74f80d8",
    "signature": "0x65da7893299d47cd19f2f0a0fa0354d8264e8fd3d2fe2224ace34ca32afdbb500303e6b0742204fd753ae6b4708522b6d5a8c527f7dc5db8bf441014913aba2c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}