{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500391732",
    "entityType": "User",
    "nonce": "0x0b57240b6f1fda705f7eae11e2de402a8533055c49fc221292c0020c7bac1841",
    "signature": "0xbcf09f32d99f73274b58447c5bbe9603336733fdddc372e47af56a03d12b47996eddb3294314ff6cf731613041f0b1e34b5ebdcc24695121b68625fdaf1b7c281c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}