{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3307",
    "entityType": "User",
    "nonce": "0x8d293397e06d8acda2bc99ba7de636900ffee91ce6f7b29eb83617c39424414c",
    "signature": "0x77e8613492663f925503edcacac7fd1f87125b29238d559bdcc5ace8c02b28bc09e05a2d38cf6b0b42041df60c17445361f66b27c0578be4a6736cb3ff85eeb81c",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}