{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9b84fd03312dc5e7cdec6fffd176859cf76656250fc70333364fd12d2e6b380e",
    "signature": "0x6ec021d9136ce4f331f3d0c58e5311dc8c84e69619d4405505d6cc6c4959d5573a4bd1dd0c5639d553ea8f1edda9bcfce232a97dc20c5d9a141a0ce5d558c8ed1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}