{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21234",
    "entityType": "User",
    "nonce": "0xc79de20d6a14cce0cf27e886198930e88f99f7dc71e4da48381421e9e3b56409",
    "signature": "0xf2f6b32afc71e4736ab049bc9bef290e74017025fdc46c85f6bc5dc0ad27aeb8200c234c2cb8effba53f86478561e5c4e90f217275a6419832efdbdd51962cbb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}