{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "573019",
    "entityType": "User",
    "nonce": "0x4c4964d78d7159a496a8803ce939c7a5cd3272013a5281f3e4b47f2efc5025a7",
    "signature": "0x768e19e74354eefc729f769803f073e00f7c30c4a32919c8f37920340eb1a6a30b6b2003ae8249030d8ac73bb557c6ae6babd5e00688f90224bb0adc17b9a39d1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}