{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x6d7e92bfc645bcc7620ae51e5ab420de6d68ae1dfb06631a91d7bbc2c4273c48",
    "signature": "0x94b41b3997c4f634f5f4ddac3f985eb0d78cdfa077a3dd086544a1ae55ace60047ee026d9236303e0748cbb2c90eeccec0c66237643e449a6dd89d40b08b315a1b",
    "signer": "0x7B499405130cFEFBBaec9980A9E37BBE42E8589D",
    "userId": "633494619"
  }
}