{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1251939",
    "entityType": "User",
    "nonce": "0x9c5701e936c52d72afe9fcbe04907c81fe40e9eb9466cd0ba0a23c4790c3312e",
    "signature": "0x64c3cb39e7358fe81099328a63ddc662f4de503772ff762c3be579473828d2bb7c5f1d8b3b99ecfe8eba8b9c5ed37129f4eb7afbbe70dfc15bc0c61e1892e9ff1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}