{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507734438",
    "entityType": "User",
    "nonce": "0xd69b88abf49f98e1509487235afc25f3ca5aeb2422ddafbf5230ebc75646ae5e",
    "signature": "0x3af4c08a9b0abf590a34043bb5a83deb586ceab18acb9f5e28e616f23b9e8cdc0417d387db61ae730daadc5b7a2f274e6686d20cb9c77040fa3de0f59c6fe0311c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}