{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x770487f750c60f8531fe2572051375fc223076261ea17f90c643d9fd0fcf72b3",
    "signature": "0x98e1b09b341b6793453a8b05a334785541b1de53ebd28d35ec171554703b8a5e6cd2c27cac33082f7baf37d991bb2821a4898f8c27d09c01561efe95ef9b6f261b",
    "signer": "0xb001DCb64Bf57b3EcC76C4Fe5AbfE2a8B084D6ba",
    "userId": "641557420"
  }
}