{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345455",
    "entityType": "User",
    "nonce": "0x4538e6ac9c6bf77d75fbf76925bcd49f1246c2c82eecd13f3a9640eb8a960129",
    "signature": "0x496663bde51d385147a4d3f8309978707c6b82f13fd85cc7d680b7c54d73e738508a409e6a45cf2325fb463fc9142f2ec2bca122193e4227e405095b4f17f7dc1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}