{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb68c3e76af6cbe7fbea2aa7a02ac385e139bc36c7fddbe81efdaeca4aa1f2897",
    "signature": "0x4506c144fd3e30121d41e52863849c04a6de2c27342f581bc62fa25804847daf7f59aebf5dfdec4a4c3f91b599ab7d191c6b1aad81b2a89d9136a453456f6e0e1b",
    "signer": "0x8A7ef0AfA3C20823CA2525BE46EC0010EBE7609a",
    "userId": "990507503"
  }
}