{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990579",
    "entityType": "User",
    "nonce": "0x2b80a4998cfa8b6b29f77c2673c734962c45e4fa3aefe61be097448397a8c8e7",
    "signature": "0x77dd7f2905a086cfde6471d3286777d179cc54c2bcf8864cf227339f08282c716a74aff0b8489a5d6ab46277278a35728db7428b4ac3fe9f2c85bb3fb45b66321b",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}