{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "446542239",
    "entityType": "User",
    "nonce": "0x1d766975658dcf8d1ffe339f037d2f2919ad5a190b7f160fca8c0f4fee9bb60a",
    "signature": "0x75bc20b6b35c563f12e8ccad3a3d066800a721dfc8de0f0db610451f09262ac2636079021caf19173fa84d1e9a2d1017241ea5b87de241f3897ffdce26aca0b51c",
    "signer": "0x0d0E0D19797534AEF52736C60B52793E9f88e24F",
    "userId": "603294620"
  }
}