{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728071",
    "entityType": "User",
    "nonce": "0xff3cb3e797ef8350b23060933d7eb55c4d47eb77000598c1d071467c86f4ca33",
    "signature": "0x1b90144ddae04dd3e0eecfefd323b1dac0248d36f5972ce36c751a986fef3d8f5c1712c670dfd78a2ce5efae470c58ca6de4c60f16ed9f0cc35e64ac09d62ac31c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}