{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x2cac962c9b561f16dec2e7992d36bf07fd5e7c492922c3c5a2028f8446e23598",
    "signature": "0x88491fd1d0752ba50f64d0e13aff2072bf59fcce3f721030be43d857cef0aa6548c900fa37b156648506d7cadd2ff1e516d86c467a2604a62ed652799bb6989e1c",
    "signer": "0x6440Dd7ce5eE2e610F909B08098D39f89250637f",
    "userId": "503764788"
  }
}