{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "378116426",
    "entityType": "User",
    "nonce": "0x53648fb4850c7aa8082af982b7cf07c94ec14f3a24dd38b25bd56a47eeb37e7e",
    "signature": "0xb3c9877843439f940b235680b336634bdcb28a5f6cb8f65be025a2949272d73517c250dcc1617cd219db57ffe4b5eddd8627f6e5128ca604c1e4289e9605b00e1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}