{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "204532442",
    "entityType": "User",
    "nonce": "0x300b1e841db444588d91067ae31a3774b804e9d7fdfef9769c8db5e6c2a30bdc",
    "signature": "0xf9371cc22d17f8f56de8ec3aee78853a6fd4173355cbb27a7602372bc1d322a15ac63a277863cd9c1aea62b3ccf3633ac39774766e87de1f42628a10b40e510b1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}