{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21098",
    "entityType": "User",
    "nonce": "0x3ffcfc53255948b64623305d65b172af0fc64782f46f4b0d2527ac1561f644b4",
    "signature": "0x60d7821cabd08b7cac032a2c8e64ffdc7b4360a0aa4cc540ba7e770c6fe5fe9a4a21e8491deb6ae7364084063cb82753d7427de55f3e52e09981d06b5a342a9d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}