{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624218",
    "entityType": "User",
    "nonce": "0x521125d4531599ef39c2d3f286bd72dd4c264181fc79a0592f9e9b26758e3036",
    "signature": "0xb4115cd7936d527e5466347dd8e504c116187558bef0cebf474ed0dcf110d20521bdb02bb97e9b330892c87ef00c43f7a2b98ee27f6bc7e4575393cc327830521b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}