{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc51fa66a8ab085be96e30b2934999eb9476b53f58184d28089c9a0b5ced38c9f",
    "signature": "0xc5d117d9785805dc20f288d2a4e107c9138c30390ecdb2e5ed3e7f30a23076f75f71b13f6f9b43878e0e2da009641ca3e6bcce1bae5f6e353e7b31bd5a6f978e1c",
    "signer": "0x9Cc78eC75533CCe255cb0D64B87f1806EeF8C4ff",
    "userId": "537863037"
  }
}