{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "657238987",
    "entityType": "User",
    "nonce": "0x0fb310dfd110c3d3cb33bfe4a53cb16e551c596a8eca449e2c2ec51f8a5d7597",
    "signature": "0xa6a1950ba19d2b2f2579eac9b72ecf86590e4a361bfe767ed9a043dd0ab028a77560130c7e5fd89a83a0e6ffab99f467f356d4d77c8cd34b516e9af80429a7f71b",
    "signer": "0x3A7B18513E18Bc08Fee68E3290BDFB9428d3DB4C",
    "userId": "681762040"
  }
}