{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xca4879549310a9c760393e060273f8ce641370b681704d09a16ff08f72f992d9",
    "signature": "0x9fd84eb629ed70cad3cec050af0e3348e2e221cf6998bccf27bb234a4a5ba6fc04ac8373ed10383bd127a698ed567d408e282c1dfc393564abb7a2907b9fb3221c",
    "signer": "0x9456c4a1d6a0f5fa7b62f1F0F28562E3Eac093d5",
    "userId": "421466063"
  }
}