{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75675",
    "entityType": "User",
    "nonce": "0x0781d764bed4690ee444f3e94f72ab5e898cacf7aa1745c5f6c9ee8d653a1a72",
    "signature": "0x7f2bab4195efa23632ff97787aa679715317b7cd7ad1b3a5ec3ec1ed7e6366d230f8fe30cf0e308347fa7288d6f1d1077edef9b87e07d866e11d0b994fc6a8421b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}