{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0x4de16e0053dab55247a80e4e5f50c17a7a568b532ff650b8a821e47d2d8c538d",
    "signature": "0x928f620fadca6b5bf275b4c0d2657ea25781217c77335737bd770db38bb3036918d3924ecf412329e447c845173b0fe68759432590d5a53b8b01924195475d871c",
    "signer": "0x75d782C5a68f76DfA69c426479B6ad14383D035f",
    "userId": "328056745"
  }
}