{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x66abc03ab233f16003c7cce40b892f2a1d39a4dbea9f637a77c64e7046efd511",
    "signature": "0xd31b6ebe0d25573d332b5e4f184d46f3e70c5746406ce3e55f60e14eed972c1a4369dd6f50818b8c63e56ed3eec79098211a4c83a3a272459192b2bc8968d0341c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}