{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0x314d791467e281b79a50cfa5d5e37029476e7b74156458e1390faca7ac7da748",
    "signature": "0xb304713e2c0aee5dfb912504ce058c867e7d5f4dca87037aa96c41228fad2fd110dae5d26a914a4eec2dba7672e9488a8ae3429418724aff9a675a42948115951b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}