{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4510",
    "entityType": "User",
    "nonce": "0x514efdb07cb6ebde40aa2c012da1d1ffac7e11dc2ec24269a559fdf28d576188",
    "signature": "0x8a990a5e070a1135b86cb40899d3c96090bce4c35dc7ac48d3c785b695ee8904074875e551826f7f129a4ca2110e7fb32fa090d85a82dedce4aa84d3c8e726991b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}