{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xd838446bd7ecc0adb13ae663d74abce2f05e0935cf456da55df7abc8d1573e69",
    "signature": "0xfbf61c6b9fdb87683dbaae3e731fdaca9f4788c30bfed19c3536354455ebb9af1aab136dcde1c1f3d02c3b6e5d6932d62f75cd4f9afc220f0afa8f403615e8531c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}