{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16521",
    "entityType": "User",
    "nonce": "0xcf84fcf245da7e22d5898fe23de8488e3efb5ad43e16089910482fc6b34cc588",
    "signature": "0x09c13235cb222fd0515c87c7783a99423b98b59e38d58c91b54d5156ed3621354e1fe45eaf8cb871ca92b4433da7c3f417df408a7a3869076b9dd3b0e61ccae21c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}