{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa128a038f248933f1b82ee62f42afca2b471215b6fe84fcad6b26e223f2dd89c",
    "signature": "0xe16bd11fa341de0e502f992e3ff926a8f0e559877c22212e48f2fd10adca6edd3d752deb978b830c7ea3af65221b646fc2a59cb5fdd8e59e3f250b4fd78416321b",
    "signer": "0xfcB5d37bDeA4716e40E3bd1EdF50954f92abBc40",
    "userId": "909856104"
  }
}