{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "43121",
    "entityType": "User",
    "nonce": "0xa3bcbabd841385067005573b73ab25231c82f8c5fb72c6ec31a857eec8404a8e",
    "signature": "0xb77b7e061d5634b1c59356a7991d3165041a46c3dea245ccbb74d7252dda1cdf4357f7b59a7f5079772b27ea1ed60e859591005884ec60074867d1d229d7c22d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}