{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508076300",
    "entityType": "User",
    "nonce": "0xc87907f81cb9b18308208c4cd7973afa4c916828d4d985f6fe5e7ca338510be5",
    "signature": "0x9d1708cc03e4879f685462ab18fed984433b35309c834d93122457719247d5225c6e9394688c0b6b3d06b70cb63346010db237578d04cf095bfa277bf35b397d1c",
    "signer": "0x5823e56644991c5f5f29870830175996Edb011c0",
    "userId": "433764837"
  }
}