{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421",
    "entityType": "User",
    "nonce": "0xd1d0ca3ebf67b271acd794bcb8e5dd33c29e4c6582273254bbd1faf487e6932b",
    "signature": "0x0a9b4ca3b4c9c46e7013a4d7f8daeafa916a088230a7fda008f99baee6c48e86544b80e70273cbd886742b30a945928db4176f5d42322c7af2cf63bb05bc9a091c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}