{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345890",
    "entityType": "User",
    "nonce": "0xa342eb7e8cb06c37eba65102f0ba44b0f5c90381079942b6ffb5035d226f1f98",
    "signature": "0xe6a9385537ff626f2d2d0c69eb359206ac36a6a038fe6cdc1443aa008861647f5e241ba012ece7be7d457b7e8cc1ca0839424bccf9c120667f983b17025f7ddd1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}