{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x68b86e3895d9885c008ec54c5b02356ccddadfe2942815c2f169fa50e8dcf69a",
    "signature": "0xc3ea7733fd94040b1779495a53ad10b01575983cad7b3c48b13b7331e10648385f02bffe17702548806a9bda6710493d1c81bd4bc09db9bfb9df9dfbdb4da1551c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}