{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619920568",
    "entityType": "User",
    "nonce": "0x1029f5a4498791d29aaadde22e9d6b7473e6bf0734e3b02459ae582b31266a91",
    "signature": "0x1dd6e8909842ce5893475a0536120254f182ab1c81e70f35c7659bfe3c928969061923efaaa8c8acb907c3c5f0a0136dd5e56d519c92e7d986b5ebc0cdd8b5ac1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}