{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "315444",
    "entityType": "User",
    "nonce": "0xf3e775fdf4f073efbd2349b6dc3a1145a4dcc3c5cd54d867f3707840da213795",
    "signature": "0x0fc9b7adbfaaa7c19f8aa72bd0eddb20ea302d7feff5301ddcc09cec7ad6a55e6a8e5bff3720e245410f348e1f989b558fecbc2d408f0cb212a4b1e54fc4ca751b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}