{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748896412",
    "entityType": "User",
    "nonce": "0xf1d9bb61dfe3febf62f92c884fde1b93e595d94d6f6c91fa453869be2e4b35da",
    "signature": "0x9b25cbf1cff64ee88d2de9c641ce176a9f6e116d00e994e508f984ca74a4277a789f0717ddcc2f3c67f0a36a6a07f14e6db789db3869938ff3e53f6298a85fad1c",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}