{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638781",
    "entityType": "User",
    "nonce": "0x6159771cf1b89f7229ffac4ca6160fb676ddf8f6e9d553c8df05d2fd8af2c623",
    "signature": "0x7ac201c0488152b8fbec68ff08ce30ed2d09b43e927658333df3d3aa1e189c900829c96d29e7bd518fe470c7b88ea9ca79ac2f1ea8374bf7de4c2063e8ad1eba1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}