{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0x0438a5d4cff4651d02b04c9e57626134e79e04454bc5e211e0a8bca0de0ff1de",
    "signature": "0xb91f4aae174391578eaf34cc56e12e6d9f12532c1f74e2c3a0f21b530a85fd856e1cac9e1f19f4c5221e1fa2acb355de8bbf290a6f35a0683004600ada5137af1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}