{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0xf6e55e655cdfa22667c56fbb7c1d3e7245bdd67912bbfbbb3ae59b03e5d9afc4",
    "signature": "0x0b13545fe3011a05be8ff10ccf61c55bc86dbed95ba2ef09e3448e720f308ded3da55ac2742ea39c635490b41fe18f9116cbc577873f0020777f8af37d5a96d51c",
    "signer": "0x5148115eBDf0d33ad5e7B95c0bC8897aFF0aB1Cb",
    "userId": "740998209"
  }
}