{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "13721",
    "entityType": "User",
    "nonce": "0x8555a60ded5de66c90ff4bdfb7a3ec613b200fe7227baf7f21d88fcefd7d00ae",
    "signature": "0xacb086af732cf64573df44808afa21f86857c6cae4687050afcc7dc27ca296540e09be4663951477b030ebdad967075057590859b9e997b425bb5112e5d1b8761c",
    "signer": "0xE8Ec1bAC66ca573950B30a9B5Bff2793f9CC5C29",
    "userId": "734516636"
  }
}