{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1489",
    "entityType": "User",
    "nonce": "0x894c3a55670dabc1cc38c1dc25c662b453d3bad0c9544a42746bc154675a81f6",
    "signature": "0xc29e99ab4774a63d3a46a841de99a4745377bc6e2af50def9d2d1d6a7c11663f0d6482414a9cb5cc2cba5bc4dbbc9c4a9bb9db979059a670da88a05cb5f12ab21b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}