{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "74730",
    "entityType": "User",
    "nonce": "0x07f548d534351f9ff7b39b734d792e39fd1216067f3f7cba607c0aae8c7b83cf",
    "signature": "0xcad30c74343e39a1b108b4bfcc6f03e4d22cbc4b2c77f1a57225eaf7863051be199c88234d10ffb0316115ea403cd8aa1a4760e8bfa02ae385e0d66fc247bfa21b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}