{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640327",
    "entityType": "User",
    "nonce": "0xd3bc96d2211f003ad35cceb99e5f4a08eec675b16771b6a64d6df77736a08679",
    "signature": "0x36613eea1f763b46d111c97cbaf37c1fce6edd4d94ce6aee434d0134be67af9b2b881a507d8c237a5d88c4ad54562f3477cd86c1249a476f75eb44753fb66f5d1b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}