{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4500",
    "entityType": "User",
    "nonce": "0x70fc8b21b4ebe5037291a69fee99837ff340083724bc1c3e8aec5217e8e470a8",
    "signature": "0xb7c56e68b536c0a4807d126089fb90132a0558481582b43b09dbdab6328c89b93b158784bd3116e8fd387492bf3d7953e9360c03163d60caad0273873243f49e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}