{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620379449",
    "entityType": "User",
    "nonce": "0x7cdfef969ab81b8a850950ecf8c4e633f4e5c09d502b25775e8c427124defff0",
    "signature": "0x618f1fa933adc23b2cefe1f5ce37793f45318f8f9f0dc24a36f1537db98b35a31bc68f36aaffcb8130aed326e355908dd66d785948a70d6e4be694f92829b2651c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}