{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "542098226",
    "entityType": "User",
    "nonce": "0x7871e7b9c6e5d4e79e9720f66549842947eca2c5e530dc30b2585177ec757bf0",
    "signature": "0x201234ad26e5eaf77bd0b08e5d68071b820536dbf9c3118ee46f4f8573a55f325d771f72b81dff69137193758c44dee36dd36c055887ed538d6eb566be4033541c",
    "signer": "0x3C59a66Fa2DdA73ee05f2E4c5327567DcA01F3F1",
    "userId": "539195506"
  }
}