{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0x6c0a310e464d8bbbf129a3ede2839c0c07fb601b60b517c5b678ef9da4f542ea",
    "signature": "0x83b0eb7b34fa895b8f3fa5bfe37a050793bfb21a4be2d600c33218351e747eb80681186058a07d55a2ce8b0e0455208c8b189743ead7e06a76765e8ad3fc1c741b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}