{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16657",
    "entityType": "User",
    "nonce": "0x6333cd422d301063058b35855c5421979799d5557f92770178613c2a1ead9317",
    "signature": "0x289598f8f91af891b588a3fd94842abebb154baee6c3be36b5114a6754cee7d05505f909c91f1b94fb6a145167ed851b3506ca5105b377faf8d12814310839041b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}