{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "255550",
    "entityType": "User",
    "nonce": "0x0c598b8a3d849502470a2502a0aa8b684edb96666de21e3df694ccc5e3862180",
    "signature": "0x817b60291d8b8b89b32ad4db5c2ec9e02ed59a9a70685222ef9553fd258f835b1d58ba51ca5d24ffd8b8ae4f6ebb80c9d22e64f8094e00990e7b230df3672a191c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}