{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624459316",
    "entityType": "User",
    "nonce": "0x97f28be6a1873f03d2cbf8a65f6abfc43f7b6630dd6d56184376a247d83c366d",
    "signature": "0x4d17962ff25923b0442b68670c4b7f3c09f8eb7e74a9c834be9d43c3d6fef8dd3edbd4c0a770b381a4bbcc8aec140333c47e17f15500f6a8bac61282a9c941aa1b",
    "signer": "0xc9647c05E4fC5025D9ba43eDd1C101d03385018A",
    "userId": "189460"
  }
}