{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0x8d54c2f82e02b4ad56151cad7307c7a6608ee296c7b12f16d25e83a7707786fb",
    "signature": "0x8d2dbd43faae17926207567271cd54bc0c13bb070d4f9673b115b15cb25d3e4b62d80bc1d2ca1bf35ceb2a075aac82de3f41f5eae388565f83213846d6ffaa691c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}