{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x69df21e8194766bb9a76bb6622e5558c3db1b0e4f094016799b8e75d1d9ad8fe",
    "signature": "0x75b657340fb0db2b5fda8adb9dff418645c5ca13084208964b0c053e2367a06d2f10d37bc5a7403510727b0e3a93f18c6242faa2fa298efe4ef16bea83691b221c",
    "signer": "0x200bde37e1742bbDD4Fc1D298018EFaD7448754e",
    "userId": "372725089"
  }
}