{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540848139",
    "entityType": "User",
    "nonce": "0x6a0ec8048fab921b0855b987eb1b05d9ad214a95014017dfb4dd91172a9e9689",
    "signature": "0x53155abb1b699ff631e503157b0e63558427d0b0f61a9f7df4784a50e8a61d856f623670e460e2fec0df6e952a346d6d9f9062daf6bbb4f4600a51da3adda20b1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}