{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xdbfb56c1fd546c3be9de396928ee313d414062038989becdc2d16d3838bb7a68",
    "signature": "0xa392c0e7b722c55a3d49d8b6bec111786b29b01bbfcc1999fa6e8e6e0406a266770bfd069cf21b271156cb5e5d89b0b5f3be69270eb8f24ddc9dba93ff7d06d81b",
    "signer": "0xBCF487B3BEFc33ddF0BFA2DEfB12a3833d17870D",
    "userId": "390610011"
  }
}