{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "219003",
    "entityType": "User",
    "nonce": "0x5d17dda8f7348f10f69ab0e81fc85c0fdfbf7b8c7cd4a8936e8ac4fbbc7ffe99",
    "signature": "0x051555f536a460b61dfdad7475cd438db0bb07967322fe28932c0a3a6bf0cf384fd2f4313611e3edcfb922090ab9a97b6d4d0d4d3c185f56e7a971eb0dbb35421c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}