{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "420620027",
    "entityType": "User",
    "nonce": "0x9cef7d03c52c669f333e37bc64eef5f81c94b38ed90f855d241a797227063a41",
    "signature": "0x0fcee0b4e28b85974401d71560a3b5cd0b531938ec3ffd35434029a5c547782a6c6409592507bc377f07103d84ab10d1d484189b16adc7ba25e470d5aed1cc321c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}