{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42121",
    "entityType": "User",
    "nonce": "0xc3607773591c2dcf11c3ef241d257a5ba68e0c584a749fe0991eb08683aa2f75",
    "signature": "0xd0d6ed7fa0a51932b0ba4d91e71b15c915632daf246494e388e8938ce5a7d03070f28b5f011e6adcfb219568e57310090c3a738b461f0082ec742b8d8185e6fa1c",
    "signer": "0x4D11c3319e766BE8ad4bD57B7E1C96300e25bcd3",
    "userId": "261446337"
  }
}