{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3e40dc9f5e68328188dfd5fa28eb9ec7c69ed518fe67728ad63ea604ac89d75d",
    "signature": "0x344220f0112d810fcd7386c5c6cee284c264f0733779394280659a597e4bb0ba13a3184c16ff1101e95ce69570a62458f1beee3817fbf539c35b1fe7fa5b706f1b",
    "signer": "0xCDad39c211C3eB59f1cE1874416292966f4752e1",
    "userId": "643398821"
  }
}