{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x4dcc1d405b99e34ccea1617d754b27274ed8c27332d7ba1088265d4f853bf5ba",
    "signature": "0xb1bfa06b81f4e1eb230b11626b2cca2d31a94d0e12da9890885aac81f70c9ad41c37da48376662e5dd5971b4507723b9fbdd0ed1e0da3b229cb50d58cbffb1631c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}