{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdd1c7b64bf9ff85bd066fba0781fcb3574992b391e981c2368437b3aa763212c",
    "signature": "0x00b017f4edafd4aa442bfbdc8efaa4f1634c4201997c9b3c2f4f22e5b5cfbfd52e6f09b0dfb8afe78403064137197b2d7ba14d9d2230ebd2c8c84adcb344bee81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}