{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42340",
    "entityType": "User",
    "nonce": "0x9c51f04cfbfbb8a7640a1b10e780e699ee96db1c7b85ce18d4657cca4b4320e5",
    "signature": "0xf3f1078f63fb281814473d27cdc24f36c5b5138224d84393bd56cdc0fd22ca0b196d94678b64ae907802d395068056e5b9d66ecdaff652566f81e7217bdd9fb91c",
    "signer": "0xD55D966a5B1D2ae3c7E642B79A648625202B91B8",
    "userId": "223852376"
  }
}