{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619242476",
    "entityType": "User",
    "nonce": "0x5241df16345681b6594f4505c9dcb8dd28ba4f5d0b56e0149ccfa8a263ea91d2",
    "signature": "0x18bedb74790e72dae792f420655a300514484e715cdba35e8c57ad915046e78670cd6cd9b409b86f2c70853fbdb9fad3347ee2babd0fe9b77156900a10443f551c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}