{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5f18f7e07ca38e1ff5948d617a34965cf326629c008ab1f483d2d80418662453",
    "signature": "0x57c7e5fdf4f79fefbd717ce68c5bfab4355fbb9f0eccda14fbf7dfbf5152581775896a1a6b6f28d48f5f652b626cc58839561e7af57fc76a7e7da64b5db7cd571c",
    "signer": "0x8Eb9c798612e3B91CCA148cCDDA9C38B99A39EaC",
    "userId": "401915062"
  }
}