{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373433",
    "entityType": "User",
    "nonce": "0x433b8e7183dc31a48673c201c639bfe71300b326e2abb20e6c2f7ad4fd740476",
    "signature": "0xf1f1b1bfb7a480eb63413c375150dfc74cfa9e400799b2e938f93c9258e8d76d7d7db0c69e1cc28df0699432bc5aa70c21d59821a6825260fc41e66cb6079b731c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}