{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "684550809",
    "entityType": "User",
    "nonce": "0x767ce99880d06787b8bdf7976f4d632ee07fce23ca1ecfab43ceaa55d27f54c0",
    "signature": "0x22d89061818d74ebf68f9c4e07983502f57c0a44f3797643ee4672670f0cd3bb67f87615e522a8f109fb2cbe7f82f8167503d85b6482824c65306a8fcc7cc4d31b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}