{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "348198680",
    "entityType": "User",
    "nonce": "0xd2ff2a2d0f0c9d622be7bedaf9396de17882b9b0a5b344b5eb069fafd0d4c56a",
    "signature": "0x558cb6f572e1355740db3718eecfc777ed7b794c8dda1b44480bafa68d4c145d39aa43f551ee55deaf1c29f3cd0f8be07d5b95aadb626e3083d39085b308763c1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}