{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb19b2943f4f5fc94c38b56300dc222462fff067b16b5d9356c04bd261c5474cc",
    "signature": "0x594439436028243d24923483bf648c487cc3432573eea549d6f3b6b5c7a069465d79a56065ebf44587e5b2149ec57c2c67a390a05c1f33244b4d5d5fc55fc2871c",
    "signer": "0xE31D679e937c708b244Bc91B30fd601EB0540Ae5",
    "userId": "223959497"
  }
}