{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0xe8b2030bfc4059cfaac84215cad6fd6fee89870bb0ec9fa055cead8a836d1bba",
    "signature": "0xd57e7afecb3f02fcc172cc519d9f8361f21407b1f01bdd924424fe9c1df831b65615be520dcbf31104614244446d5d3fe39f6f273d31c0529e5c080ec5450b721c",
    "signer": "0x6B239e9B75f27b519de7Bad3a26a0b7d30e32D3f",
    "userId": "311257477"
  }
}