{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "884561400",
    "entityType": "User",
    "nonce": "0x856132549490c472fc8c3ba5a91a3079dc22ec9477ea5e57c3e892876bf53234",
    "signature": "0x64f8ab7ab75e9f91051b7a343a81f988554736bd6a44785e9923853f7d42724269b845c6c5814048d16bd909336b4e749492d8db0c957293129a92b0efaaaf371b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}