{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2194",
    "entityType": "User",
    "nonce": "0x54af25be590ee8b02fedf53e67b9e2ae98b9b657f78e0a4fa4119a02fa209ac0",
    "signature": "0x900c274b5851db380e0053a4492bff8302b484bad3ccf73a17b48e26f8df107a074a1883af3e6da5a789a971bb001da4537295fd02fff720f5554b2043047d4d1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}