{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "871929900",
    "entityType": "User",
    "nonce": "0x4cc23c47b0b669eaded358f586ac58cd623d3754488c4ef080bccb5baf2f5b06",
    "signature": "0xff774fe3e90df52ca5d779702a11a839d5bdb86637b279ab53c1df26c2f6250b17d740fc99833c3880dd8ea519dec05e3b8af9943e1683689a40e3cf1895180f1b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}