{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12939",
    "entityType": "User",
    "nonce": "0x988fdfaeb4a0a0dc5a18a6dd274b6eb63f7feb81ec1fa7ac366f40d1e2e1163a",
    "signature": "0x71e8cfa12ed42842c75ae3363657840e4e210136648a4a9bb42b84bc2bd07888467246ba7e24ef11a9e657a2b22b24f39745cf8b3aee1bac3689edad5c5057c31c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}