{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "507938",
    "entityType": "User",
    "nonce": "0xc76822b7d1d9b58a9d4fa7e6e68c4a143c541c019724b83982147a293d7b387f",
    "signature": "0xc83663fd5369b05afa0fd7d2eea9a7a0488e4ffc63c45d7ca7bc0507f3d15d1840016b75bcfb6eef2be49cd0ef21d1b9234af53757652a3c31477bd3e6ae36da1c",
    "signer": "0x646BEca96ab04bFb6DD725EEBc0383e1Ef13deeE",
    "userId": "588448440"
  }
}