{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152450",
    "entityType": "User",
    "nonce": "0x1b4a514f348d14f2fe40ab2c02f04bc41d70fa31541340c1f08f3c88d86c2615",
    "signature": "0xa2d9cf801d0d9807346ee7e67c3f3173b702598de0226c5d2b7e999c2c2ef438119f856aea5a173411dbcbae4c48eb8300826b1adf3e750cac41c356ed0fafae1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}