{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325",
    "entityType": "User",
    "nonce": "0x72db98e2bac7f4a97bb4fccdb87959f700b40fa58c4c2249de1ee95d274a8c17",
    "signature": "0x68b8500e6a2e243645e65ac315551948d0d1b0d33d76ad0ef250a31ba5aa1d982d31bf5d9801da96a918d4256c73ed0e3661789b56a791a36405f68416ac2b9f1c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}